Refactor with adding unit test for OpenstackNetworkingUtil

Change-Id: Ie116b9215fb53ecc6a06d75da6d29ef2f2cb1d6a
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSubnetWebResource.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSubnetWebResource.java
index 0c46bfc..9082ae1 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSubnetWebResource.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSubnetWebResource.java
@@ -42,7 +42,7 @@
 import static javax.ws.rs.core.Response.created;
 import static javax.ws.rs.core.Response.noContent;
 import static javax.ws.rs.core.Response.status;
-import static org.onosproject.openstacknetworking.util.OpenstackUtil.jsonToModelEntity;
+import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.jsonToModelEntity;
 
 @Path("subnets")
 public class OpenstackSubnetWebResource extends AbstractWebResource {