Introduce driver property to suppress group feature

Change-Id: I7bf9857a7a71e3b4ef64aa7fd2c8777ff20dc95b
diff --git a/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java b/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java
index 0b95f1d..9b87b22 100644
--- a/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java
+++ b/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java
@@ -24,6 +24,7 @@
 import org.onosproject.net.Device;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.PortNumber;
+import org.onosproject.net.driver.DriverServiceAdapter;
 import org.onosproject.net.flow.DefaultTrafficTreatment;
 import org.onosproject.net.flow.TrafficTreatment;
 import org.onosproject.net.group.DefaultGroupBucket;
@@ -82,6 +83,7 @@
         provider.controller = controller;
         provider.providerRegistry = providerRegistry;
         provider.cfgService = new ComponentConfigAdapter();
+        provider.driverService = new DriverServiceAdapter();
         provider.activate(null);
     }
 
@@ -435,4 +437,4 @@
             return null;
         }
     }
-}
\ No newline at end of file
+}