Add dependency on OVNMacAddressNetwork for role ResourceGroup

The role ResourceGroup (puppet/role.role.j2.yaml template) tries to
create a port on the OVNMacAddressNetwork, as such we need a dependency
in the top level stack, otherwise the network may not exist before Heat
attempts to create the port.

Change-Id: Ie453fcdbb8eb42bbf718506b0b9b443ccd84543a
Signed-off-by: James Slagle <jslagle@redhat.com>
(cherry picked from commit 7a4a43d55d)

overcloud.j2.yaml

@@ -834,7 +834,9 @@ resources:
 
   {{role.name}}:
     type: OS::Heat::ResourceGroup
-    depends_on: Networks
+    depends_on:
+      - Networks
+      - OVNMacAddressNetwork
     update_policy:
       batch_create:
         max_batch_size: {get_param: NodeCreateBatchSize}