Add a set of unit tests for openstack telemetry app

Change-Id: Ib5963c61ef0c0302a90a4f30d3dd1f0ec2862aea
diff --git a/apps/openstacknetworking/app/src/test/java/org/onosproject/openstacknetworking/impl/DefaultInstancePortTest.java b/apps/openstacknetworking/app/src/test/java/org/onosproject/openstacknetworking/impl/DefaultInstancePortTest.java
index 50e8f01..ae0e4b4 100644
--- a/apps/openstacknetworking/app/src/test/java/org/onosproject/openstacknetworking/impl/DefaultInstancePortTest.java
+++ b/apps/openstacknetworking/app/src/test/java/org/onosproject/openstacknetworking/impl/DefaultInstancePortTest.java
@@ -75,7 +75,7 @@
     private InstancePort instancePort2;
 
     /**
-     * Checks that the DefaultInstancePort class is immutable.
+     * Tests class immutability.
      */
     @Test
     public void testImmutability() {