FIxing an STC failure. VirtualNetworkManager must implement VirtualNetworkProviderRegistry.

Change-Id: I6044a4f13653f306e495ffa486c0470d2e6323b3
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java
index f264658..281dd4a 100644
--- a/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java
@@ -38,6 +38,7 @@
 import org.onosproject.incubator.net.virtual.VirtualNetworkIntent;
 import org.onosproject.incubator.net.virtual.VirtualNetworkListener;
 import org.onosproject.incubator.net.virtual.VirtualNetworkProvider;
+import org.onosproject.incubator.net.virtual.VirtualNetworkProviderRegistry;
 import org.onosproject.incubator.net.virtual.VirtualNetworkProviderService;
 import org.onosproject.incubator.net.virtual.VirtualNetworkService;
 import org.onosproject.incubator.net.virtual.VirtualNetworkStore;
@@ -74,8 +75,8 @@
 @Service
 public class VirtualNetworkManager
         extends AbstractListenerProviderRegistry<VirtualNetworkEvent, VirtualNetworkListener,
-        VirtualNetworkProvider, VirtualNetworkProviderService>
-        implements VirtualNetworkService, VirtualNetworkAdminService {
+                                                 VirtualNetworkProvider, VirtualNetworkProviderService>
+        implements VirtualNetworkService, VirtualNetworkAdminService, VirtualNetworkProviderRegistry {
 
     private final Logger log = LoggerFactory.getLogger(getClass());