Fix: make all openstack resource name optional

Change-Id: I6f4fd34ab691701ea0d6a15eb77428c9e8f4e700
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/DistributedSecurityGroupStore.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/DistributedSecurityGroupStore.java
index 78e0e4c..ca97bb2 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/DistributedSecurityGroupStore.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/DistributedSecurityGroupStore.java
@@ -115,7 +115,7 @@
     @Override
     public void createSecurityGroup(SecurityGroup sg) {
         osSecurityGroupStore.compute(sg.getId(), (id, existing) -> {
-            final String error = sg.getName() + ERR_DUPLICATE;
+            final String error = sg.getId() + ERR_DUPLICATE;
             checkArgument(existing == null, error);
             return sg;
         });
@@ -124,7 +124,7 @@
     @Override
     public void updateSecurityGroup(SecurityGroup sg) {
         osSecurityGroupStore.compute(sg.getId(), (id, existing) -> {
-            final String error = sg.getName() + ERR_NOT_FOUND;
+            final String error = sg.getId() + ERR_NOT_FOUND;
             checkArgument(existing != null, error);
             return sg;
         });