[ONOS-7492] Add unit test for openstack security group REST API

Change-Id: Ifd7b99afac9de0d0235fd6a4d74e5948656b92b6
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupWebResource.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupWebResource.java
index 3a2e41d..da335a3 100644
--- a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupWebResource.java
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/web/OpenstackSecurityGroupWebResource.java
@@ -15,7 +15,6 @@
  */
 package org.onosproject.openstacknetworking.web;
 
-import org.onlab.osgi.DefaultServiceDirectory;
 import org.onosproject.openstacknetworking.api.OpenstackSecurityGroupAdminService;
 import org.onosproject.rest.AbstractWebResource;
 import org.openstack4j.openstack.networking.domain.NeutronSecurityGroup;
@@ -51,7 +50,7 @@
     private static final String SECURITY_GROUPS = "security-groups";
 
     private final OpenstackSecurityGroupAdminService adminService =
-            DefaultServiceDirectory.getService(OpenstackSecurityGroupAdminService.class);
+                                    get(OpenstackSecurityGroupAdminService.class);
 
     @Context
     private UriInfo uriInfo;