Fix swarm functional job

Now swarm functional job failed due to a a regression issue caused by
If11ba863a2aa538efe1e3e850084bdd33afd27d2 This patch fixes.

Task: 29766
Story: 2004195

Change-Id: I830ab66775e0dd57766cdab25d06500d85651dc1

magnum/drivers/swarm_fedora_atomic_v2/templates/swarmcluster.yaml

@@ -400,7 +400,7 @@ resources:
           rexray_preempt: {get_param: rexray_preempt}
           verify_ca: {get_param: verify_ca}
           openstack_ca: {get_param: openstack_ca}
-          nodes_server_group_id: {get_resource: worker_nodes_server_group}
+          nodes_server_group_id: {get_resource: master_nodes_server_group}
           availability_zone: {get_param: availability_zone}
 
   swarm_nodes:
@@ -445,7 +445,7 @@ resources:
           rexray_preempt: {get_param: rexray_preempt}
           verify_ca: {get_param: verify_ca}
           openstack_ca: {get_param: openstack_ca}
-          nodes_server_group_id: {get_resource: nodes_server_group}
+          nodes_server_group_id: {get_resource: worker_nodes_server_group}
           availability_zone: {get_param: availability_zone}
 
 outputs: