NETOBSERV-1959: Remove hardcoded columns rendering + other enhancements (#633)

* NETOBSERV-1959: Remove hardcoded columns rendering + other enhancements

- Remove hardcoded columns
- Change some of the rendering scripted functions:
  - getConcatenatedValue -> concat now dedicated to just concatenate
    values
  - they can now accept litterals (e.g. concat(DstAddr,':',DstPort))
  - remove getSrcOrDstValue since there was also "[...]" for the same
    role
  - add new kubeObject func to show kind-name-namespace sort of things
- Improve performance by avoiding re-parsing everything for every rendered
  flow
  - there's probably more that we could do on that side
- Add unit tests

* preprocess a bit more of parsed functions

* address feedback

* Fix issues about visible fields in side panel

Previously, visible fields were determined out of several criteria
including:
- fields with calculated values were filtered out
- record with null value was filtered out (as opposed to undefined)

Also, "Common" columns was determined by having a calculated value (ie.
non-common columns were prohibited to use calculated)

This must change since columns can now have calculated and still must be
visible (e.g. SrcK8S_Name is a kubeObject calculated value)

- So, Common now is when calculated in the form of "[a,b]"
- Visible columns for side panel is now based on being tied to fields

* Use fieldValue func for filters

* NETOBSERV-1969: Fix IcmpType & IcmpCode

Those fields should be correctly displayed when ICMP data is present,
and not displayed (in side panel) when ICMP data is absent.

* format

Author: jotak

config/sample-config.yaml

@@ -192,6 +192,7 @@ frontend:
       docURL: http://kubernetes.io/docs/user-guide/identifiers#names
       field: SrcK8S_Name
       filter: src_name
+      calculated: kubeObject(SrcK8S_Type,SrcK8S_Namespace,SrcK8S_Name,0)
       default: true
       width: 15
     - id: SrcK8S_Type
@@ -213,6 +214,7 @@ frontend:
       docURL: https://kubernetes.io/docs/concepts/overview/working-with-objects/owners-dependents/
       field: SrcK8S_OwnerName
       filter: src_owner_name
+      calculated: kubeObject(SrcK8S_OwnerType,SrcK8S_Namespace,SrcK8S_OwnerName,0)
       default: false
       width: 15
     - id: SrcK8S_OwnerType
@@ -236,6 +238,7 @@ frontend:
       docURL: http://kubernetes.io/docs/user-guide/identifiers#namespaces
       field: SrcK8S_Namespace
       filter: src_namespace
+      calculated: kubeObject('Namespace','',SrcK8S_Namespace,0)
       default: true
       width: 15
     - id: SrcAddr
@@ -277,24 +280,25 @@ frontend:
       docURL: https://kubernetes.io/docs/concepts/architecture/nodes/
       field: SrcK8S_HostName
       filter: src_host_name
+      calculated: kubeObject('Node','',SrcK8S_HostName,0)
       default: false
       width: 15
     - id: SrcK8S_Object
       group: Source
       name: Kubernetes Object
-      calculated: getConcatenatedValue(SrcAddr,SrcPort,SrcK8S_Type,SrcK8S_Namespace,SrcK8S_Name)
+      calculated: kubeObject(SrcK8S_Type,SrcK8S_Namespace,SrcK8S_Name,1) or concat(SrcAddr,':',SrcPort)
       default: false
       width: 15
     - id: SrcK8S_OwnerObject
       group: Source
       name: Owner Kubernetes Object
-      calculated: getConcatenatedValue(SrcAddr,SrcPort,SrcK8S_OwnerType,SrcK8S_Namespace,SrcK8S_OwnerName)
+      calculated: kubeObject(SrcK8S_OwnerType,SrcK8S_Namespace,SrcK8S_OwnerName,1)
       default: false
       width: 15
     - id: SrcAddrPort
       group: Source
       name: IP & Port
-      calculated: getConcatenatedValue(SrcAddr,SrcPort)
+      calculated: concat(SrcAddr,':',SrcPort)
       default: false
       width: 15
     - id: SrcZone
@@ -312,6 +316,7 @@ frontend:
       docURL: http://kubernetes.io/docs/user-guide/identifiers#names
       field: DstK8S_Name
       filter: dst_name
+      calculated: kubeObject(DstK8S_Type,DstK8S_Namespace,DstK8S_Name,0)
       default: true
       width: 15
     - id: DstK8S_Type
@@ -333,6 +338,7 @@ frontend:
       docURL: https://kubernetes.io/docs/concepts/overview/working-with-objects/owners-dependents/
       field: DstK8S_OwnerName
       filter: dst_owner_name
+      calculated: kubeObject(DstK8S_OwnerType,DstK8S_Namespace,DstK8S_OwnerName,0)
       default: false
       width: 15
     - id: DstK8S_OwnerType
@@ -356,6 +362,7 @@ frontend:
       docURL: http://kubernetes.io/docs/user-guide/identifiers#namespaces
       field: DstK8S_Namespace
       filter: dst_namespace
+      calculated: kubeObject('Namespace','',DstK8S_Namespace,0)
       default: true
       width: 15
     - id: DstAddr
@@ -397,24 +404,25 @@ frontend:
       docURL: https://kubernetes.io/docs/concepts/architecture/nodes/
       field: DstK8S_HostName
       filter: dst_host_name
+      calculated: kubeObject('Node','',DstK8S_HostName,0)
       default: false
       width: 15
     - id: DstK8S_Object
       group: Destination
       name: Kubernetes Object
-      calculated: getConcatenatedValue(DstAddr,DstPort,DstK8S_Type,DstK8S_Namespace,DstK8S_Name)
+      calculated: kubeObject(DstK8S_Type,DstK8S_Namespace,DstK8S_Name,1) or concat(DstAddr,':',DstPort)
       default: false
       width: 15
     - id: DstK8S_OwnerObject
       group: Destination
       name: Owner Kubernetes Object
-      calculated: getConcatenatedValue(DstAddr,DstPort,DstK8S_OwnerType,DstK8S_Namespace,DstK8S_OwnerName)
+      calculated: kubeObject(DstK8S_OwnerType,DstK8S_Namespace,DstK8S_OwnerName,1)
       default: false
       width: 15
     - id: DstAddrPort
       group: Destination
       name: IP & Port
-      calculated: getConcatenatedValue(DstAddr,DstPort)
+      calculated: concat(DstAddr,':',DstPort)
       default: false
       width: 15
     - id: DstZone
@@ -427,52 +435,52 @@ frontend:
       feature: zones
     - id: K8S_Name
       name: Names
-      calculated: getSrcOrDstValue(SrcK8S_Name,DstK8S_Name)
+      calculated: '[SrcK8S_Name,DstK8S_Name]'
       default: false
       width: 15
     - id: K8S_Type
       name: Kinds
-      calculated: getSrcOrDstValue(SrcK8S_Type,DstK8S_Type)
+      calculated: '[SrcK8S_Type,DstK8S_Type]'
       default: false
       width: 10
     - id: K8S_OwnerName
       name: Owners
-      calculated: getSrcOrDstValue(SrcK8S_OwnerName,DstK8S_OwnerName)
+      calculated: '[SrcK8S_OwnerName,DstK8S_OwnerName]'
       default: false
       width: 15
     - id: K8S_OwnerType
       name: Owner Kinds
-      calculated: getSrcOrDstValue(SrcK8S_OwnerType,DstK8S_OwnerType)
+      calculated: '[SrcK8S_OwnerType,DstK8S_OwnerType]'
       default: false
       width: 10
     - id: K8S_Namespace
       name: Namespaces
-      calculated: getSrcOrDstValue(SrcK8S_Namespace,DstK8S_Namespace)
+      calculated: '[SrcK8S_Namespace,DstK8S_Namespace]'
       default: false
       width: 15
     - id: Addr
       name: IP
-      calculated: getSrcOrDstValue(SrcAddr,DstAddr)
+      calculated: '[SrcAddr,DstAddr]'
       default: false
       width: 10
     - id: Port
       name: Ports
-      calculated: getSrcOrDstValue(SrcPort,DstPort)
+      calculated: '[SrcPort,DstPort]'
       default: false
       width: 10
     - id: Mac
       name: MAC
-      calculated: getSrcOrDstValue(SrcMac,DstMac)
+      calculated: '[SrcMac,DstMac]'
       default: false
       width: 10
     - id: K8S_HostIP
       name: Node IP
-      calculated: getSrcOrDstValue(SrcK8S_HostIP,DstK8S_HostIP)
+      calculated: '[SrcK8S_HostIP,DstK8S_HostIP]'
       default: false
       width: 10
     - id: K8S_HostName
       name: Node Name
-      calculated: getSrcOrDstValue(SrcK8S_HostName,DstK8S_HostName)
+      calculated: '[SrcK8S_HostName,DstK8S_HostName]'
       default: false
       width: 15
     - id: K8S_Object
@@ -581,7 +589,7 @@ frontend:
     - id: CollectionTime
       name: Collection Time
       tooltip: Reception time of the record by the collector.
-      calculated: multiply(TimeReceived,1000),
+      calculated: multiply(TimeReceived,1000)
       field: TimeReceived
       default: false
       width: 15