Pass manageiq-smartstate the Resource Group Name not the Object

A previous fix that was backported to the FINE branch fixed this
issue caused by the resource group being changed from a string
to an object a while ago but the fix never went into the
MASTER branch.  This will fix in Master and should be back-ported
to Gaprindashvili

app/models/manageiq/providers/azure/cloud_manager/vm_or_template_shared/scanning.rb

@@ -25,7 +25,7 @@ def perform_metadata_scan(ost)
         vm_args[:image_uri] = uid_ems
       end
     else
-      vm_args[:resource_group] = resource_group
+      vm_args[:resource_group] = resource_group.name
       vm_args[:snapshot] = ost.scanData["snapshot"]["name"] unless managed_disk?
     end