Fix: correct typos and return status for openstack security group

Change-Id: Ie07f0c20130447b11a1dbe9da6d355158a4f5cbe
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupRuleWebResource.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupRuleWebResource.java
index 5f5845b..1615c87 100644
--- a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupRuleWebResource.java
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupRuleWebResource.java
@@ -60,7 +60,7 @@
      *
      * @param input security group JSON input stream
      * @return 201 CREATED if the JSON is correct, 400 BAD_REQUEST if the JSON
-     * is invalid or duplicated port already exists
+     * is invalid or duplicated security group rule ID already exists
      * @onos.rsModel NeutronSecurityGroupRule
      */
     @POST