Support rebalance the mastership for running openstack troubleshoot

Change-Id: Ibe7e8bbc60211451f57bea9e5de6a1575b03d36b
diff --git a/apps/openstacktroubleshoot/app/src/main/java/org/onosproject/openstacktroubleshoot/cli/OpenstackNorthSouthProbeCommand.java b/apps/openstacktroubleshoot/app/src/main/java/org/onosproject/openstacktroubleshoot/cli/OpenstackNorthSouthProbeCommand.java
index 77c24bb..c409641 100644
--- a/apps/openstacktroubleshoot/app/src/main/java/org/onosproject/openstacktroubleshoot/cli/OpenstackNorthSouthProbeCommand.java
+++ b/apps/openstacktroubleshoot/app/src/main/java/org/onosproject/openstacktroubleshoot/cli/OpenstackNorthSouthProbeCommand.java
@@ -79,7 +79,8 @@
 
         for (OpenstackNode gw : osNodeService.completeNodes(GATEWAY)) {
             if (!localNodeId.equals(mastershipService.getMasterFor(gw.intgBridge()))) {
-                error("Current node is not the master for all gateway nodes. Please enforce mastership first!");
+                error("Current node is not the master for all gateway nodes. " +
+                        "Please enforce mastership first using openstack-reset-mastership -c !");
                 return;
             }
         }