change versioning format

etc/azure/deploy-to-k8s.yml

@@ -1,3 +1,6 @@
+variables:
+  version: '$(Date:yyyyMMdd).$(Rev:r)'
+
 trigger: none
 
 pool:
@@ -8,7 +11,7 @@ steps:
   displayName: Build docker images
   inputs:
     filePath: 'etc/k8s/scripts/build-images.ps1'
-    arguments: '-version $(Build.BuildId)'
+    arguments: '-version $(version)'
 
 - task: Docker@2
   displayName: Login to ACR
@@ -20,7 +23,7 @@ steps:
   displayName: Push images to ACR
   inputs:
     filePath: 'etc/azure/scripts/push-images.ps1'
-    arguments: '-version $(Build.BuildId)'
+    arguments: '-version $(version)'
 
 - task: Kubernetes@1
   displayName: Delete migrator job
@@ -49,4 +52,4 @@ steps:
     chartName: 'etc/k8s/helm-chart/eventhub'
     releaseName: 'eh-az'
     valueFile: 'etc/k8s/helm-chart/eventhub/values.azure.yaml'
-    arguments: '--namespace eventhub --create-namespace --set global.eventHubImageVersion=$(Build.BuildId)'
+    arguments: '--namespace eventhub --create-namespace --set global.eventHubImageVersion=$(version)'