[ONOS-7752] check north-south reachability for troubleshoot purpose

Change-Id: I973047c0fcd4fb241ad010fbbef9d016510b8deb
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java
index 71fc440..71d9bb1 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java
@@ -156,7 +156,7 @@
     String networkType(String netId);
 
     /**
-     * Returns gateway ip address upplied port ID.
+     * Returns gateway ip address with supplied port ID.
      *
      * @param portId openstack port id
      * @return gateway ip address