ccloud: fix export locations for CIFS on migration

export locations stay the same, look at junction path like NFS
downstream fix for https://bugs.launchpad.net/manila/+bug/1920937

Change-Id: Ia2439b0114ad3bee058fe9b0ee606e41b37a5869

manila/share/drivers/netapp/dataontap/cluster_mode/lib_base.py

@@ -2905,7 +2905,8 @@ def migration_complete(self, context, source_share, destination_share,
         # match the name of the share.
         export_locations = self._create_export(
             destination_share, share_server, vserver, vserver_client,
-            clear_current_export_policy=False)
+            clear_current_export_policy=False,
+            ensure_share_already_exists=True)
         src_snaps_dict = {s['id']: s for s in source_snapshots}
         snapshot_updates = {}
 

manila/share/drivers/netapp/dataontap/protocols/cifs_cmode.py

@@ -45,11 +45,13 @@ def create_share(self, share, share_name,
         if share['share_proto'].lower() != 'multi':
             self._client.set_volume_security_style(share_name,
                                                    security_style='ntfs')
+        export_path = self._client.get_volume_junction_path(
+            share_name, is_style_cifs=True).lstrip("\\")
 
         # Return a callback that may be used for generating export paths
         # for this share.
-        return (lambda export_address, share_name=share_name:
-                r'\\%s\%s' % (export_address, share_name))
+        return (lambda export_address, export_path=export_path:
+                r'\\%s\%s' % (export_address, export_path))
 
     @na_utils.trace
     def delete_share(self, share, share_name):