update the eventrouter image to match logging 5.0 (openshift#1852)

features/step_definitions/logging.rb

@@ -391,15 +391,32 @@
   step %Q/admin ensures "eventrouter" service_account is deleted from the "openshift-logging" project after scenario/
   step %Q/admin ensures "eventrouter" config_map is deleted from the "openshift-logging" project after scenario/
   step %Q/admin ensures "eventrouter" deployment is deleted from the "openshift-logging" project after scenario/
-  image_version = cluster_version('version').channel.split('-')[1]
+  clo_csv_version = subscription("cluster-logging").current_csv(cached: false)
+  if clo_csv_version.include? "cluster-logging"
+    image_version = clo_csv_version.match(/cluster-logging\.(.*)/)[1].split('-')[0]
+  else
+    image_version = clo_csv_version.match(/clusterlogging\.(.*)/)[1].split('-')[0]
+  end
+  if image_version.start_with?("5")
+    # from logging 5.0, the image name is changed to eventrouter-rhel8
+    image_name = "eventrouter-rhel8"
+  else
+    image_name = "logging-eventrouter"
+  end
+
   if image_content_source_policy('brew-registry').exists?
     registry = image_content_source_policy('brew-registry').mirror_repository[0]
-    image = "#{registry}/rh-osbs/openshift-ose-logging-eventrouter:v#{image_version}"
+    if image_version.start_with?("5")
+      # from logging 5.0, the image namespace is changed to openshift-logging
+      image = "#{registry}/rh-osbs/openshift-logging-#{image_name}:v#{image_version}"
+    else
+      image = "#{registry}/rh-osbs/openshift-ose-#{image_name}:v#{image_version}"
+    end
   else
     # get image registry from CLO
-    image_registry = deployment('cluster-logging-operator').container_spec(name: 'cluster-logging-operator').image
-    registry = image_registry.split('@')[0].gsub("cluster-logging-operator", "logging-eventrouter")
-    image = "#{registry}:v#{image_version}"
+    clo_image = deployment('cluster-logging-operator').container_spec(name: 'cluster-logging-operator').image
+    registry = clo_image.split(/cluster-logging(.*)/)[0]
+    image = "#{registry}#{image_name}:v#{image_version}"
   end
   step %Q/I process and create:/, table(%{
     | f | #{BushSlicer::HOME}/testdata/logging/eventrouter/internal_eventrouter.yaml |