Add more documentation to namespace values setting, combine if statements in chart

Author: gamingrobot

manifests/helm/templates/operator/namespace.yaml.tpl

@@ -1,10 +1,8 @@
-{{ if ne .Values.operator.enabled false }}
-{{ if .Values.namespace }}
+{{ if and (ne .Values.operator.enabled false) .Values.namespace }}
 kind: Namespace
 apiVersion: v1
 metadata:
   name: '{{ default .Release.Namespace .Values.namespace }}'
   labels:
     app.kubernetes.io/part-of: contrast-agent-operator
 {{ end }}
-{{ end }}

manifests/helm/values.yaml

@@ -1,4 +1,5 @@
 # Namespace for the agent-operator, will be created if specified.
+# When left blank the Helm namespace will be used and can be changed using `helm -n <namespace>`. Helm's `--create-namespace` option may be needed when the Helm namespace does not exist and should be created.
 namespace: contrast-agent-operator
 image:
   registry: contrast