Add Logstash dictionary of LocalizedValue fields for operationName values

[bhozar]

Enrich data by including a Logstash dictionary of LocalizedValue fields for operationName as they are not supplied by the Azure Log streaming system and they will make the logs more readable.
e.g.

    "operationName": {
        "value": "Microsoft.Resourcehealth/healthevent/Activated/action",
        "localizedValue": "Health Event Activated"
    },

https://docs.microsoft.com/en-us/azure/azure-monitor/platform/activity-log-schema

Event Hub Explorer was showing no LocalizedValues are being streamed to Event Hub, so unless MS add them as additional fields in the future the only other option for readable operation names is a manually maintained dictionary file in Logstash.

Example operationNames used in a 48hr period:

operationName.keyword	Count 
MICROSOFT.STORAGE/STORAGEACCOUNTS/LISTKEYS/ACTION	
2.87 K
MICROSOFT.AUTHORIZATION/POLICIES/AUDIT/ACTION	2.35 K
MICROSOFT.APIMANAGEMENT/SERVICE/GETSSOTOKEN/ACTION	2.19 K
MICROSOFT.APIMANAGEMENT/SERVICE/USERS/TOKEN/ACTION	2.18 K
Microsoft.Resourcehealth/healthevent/Updated/action	441.00
MICROSOFT.COMPUTE/VIRTUALMACHINES/DEALLOCATE/ACTION	323.00
MICROSOFT.COMPUTE/VIRTUALMACHINES/START/ACTION	204.00
MICROSOFT.INSIGHTS/ALERTRULES/DELETE	138.00
Microsoft.Resourcehealth/healthevent/Activated/action	112.00
MICROSOFT.WEB/SERVERFARMS/WRITE	111.00
Microsoft.Resourcehealth/healthevent/Resolved/action	109.00
MICROSOFT.APIMANAGEMENT/SERVICE/APIS/OPERATIONS/WRITE	86.00
MICROSOFT.ALERTSMANAGEMENT/SMARTDETECTORALERTRULES/WRITE	48.00
MICROSOFT.AUTHORIZATION/LOCKS/WRITE	38.00
MICROSOFT.DOCUMENTDB/DATABASEACCOUNTS/LISTKEYS/ACTION	38.00
Microsoft.Insights/AutoscaleSettings/Scaledown/Action	38.00
MICROSOFT.APIMANAGEMENT/SERVICE/APIS/OPERATIONS/POLICIES/WRITE	36.00
MICROSOFT.APIMANAGEMENT/SERVICE/PRODUCTS/APIS/WRITE	36.00
Microsoft.Insights/AutoscaleSettings/Scaleup/Action	36.00
MICROSOFT.COMPUTE/RESTOREPOINTCOLLECTIONS/RESTOREPOINTS/RETRIEVESASURIS/ACTION	32.00
MICROSOFT.STORAGE/STORAGEACCOUNTS/LISTACCOUNTSAS/ACTION	32.00
MICROSOFT.COMPUTE/RESTOREPOINTCOLLECTIONS/RESTOREPOINTS/DELETE	23.00
MICROSOFT.CONTAINERSERVICE/MANAGEDCLUSTERS/LISTCLUSTERUSERCREDENTIAL/ACTION	22.00
MICROSOFT.INSIGHTS/METRICALERTS/WRITE	22.00
MICROSOFT.COMPUTE/DISKS/WRITE	18.00
MICROSOFT.COMPUTE/RESTOREPOINTCOLLECTIONS/RESTOREPOINTS/WRITE	18.00
MICROSOFT.DOCUMENTDB/DATABASEACCOUNTS/BACKUP/ACTION	18.00
Microsoft.Insights/AutoscaleSettings/ScaledownResult/Action	18.00
Microsoft.Insights/AutoscaleSettings/ScaleupResult/Action	18.00
MICROSOFT.COMPUTE/VIRTUALMACHINES/EXTENSIONS/WRITE	15.00
MICROSOFT.DOCUMENTDB/DATABASEACCOUNTS/READONLYKEYS/ACTION	14.00
MICROSOFT.APIMANAGEMENT/SERVICE/APIS/POLICIES/WRITE	12.00
MICROSOFT.APIMANAGEMENT/SERVICE/APIS/WRITE	12.00
MICROSOFT.APIMANAGEMENT/SERVICE/APIVERSIONSETS/WRITE	12.00
MICROSOFT.APIMANAGEMENT/SERVICE/PRODUCTS/WRITE	12.00
MICROSOFT.COMPUTE/VIRTUALMACHINES/WRITE	11.00
MICROSOFT.NETWORK/LOADBALANCERS/WRITE	9.00
MICROSOFT.APIMANAGEMENT/SERVICE/WRITE	8.00
MICROSOFT.APIMANAGEMENT/SERVICE/CERTIFICATES/WRITE	6.00
MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE	6.00
MICROSOFT.COMPUTE/REGISTER/ACTION	4.00
MICROSOFT.NETWORK/REGISTER/ACTION	4.00
MICROSOFT.RESOURCES/DEPLOYMENTS/VALIDATE/ACTION	4.00
Microsoft.Advisor/recommendations/available/action	4.00
Microsoft.Insights/alert/proactivediagnostics	4.00
Microsoft.Security/tasks/write	4.00
MICROSOFT.APIMANAGEMENT/SERVICE/DELETE	3.00
MICROSOFT.COMPUTE/AVAILABILITYSETS/WRITE	3.00
MICROSOFT.NETWORK/NETWORKSECURITYGROUPS/SECURITYRULES/WRITE	3.00
MICROSOFT.RESOURCES/DEPLOYMENTS/WRITE	3.00
RunFinished	3.00
MICROSOFT.APIMANAGEMENT/SERVICE/CERTIFICATES/DELETE	2.00
MICROSOFT.AUTHORIZATION/LOCKS/DELETE	2.00
MICROSOFT.CLASSICSTORAGE/STORAGEACCOUNTS/LISTKEYS/ACTION	2.00
MICROSOFT.EVENTHUB/NAMESPACES/EVENTHUBS/AUTHORIZATIONRULES/LISTKEYS/ACTION	2.00
MICROSOFT.KEYVAULT/VAULTS/WRITE	2.00
MICROSOFT.RESOURCES/SUBSCRIPTIONS/RESOURCEGROUPS/WRITE	2.00
Microsoft.ApiManagement/service/write	2.00
RunStarted	2.00
Microsoft.ServiceHealth/actionrequired/action	1.00