Completer fixes for core ONOS CLI commands

Change-Id: Icedfc542ad93a2825b592f3deb6cd96d91779544
diff --git a/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualNetworkIntentCreateCommand.java b/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualNetworkIntentCreateCommand.java
index 5684ae5..f57f3f7 100644
--- a/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualNetworkIntentCreateCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualNetworkIntentCreateCommand.java
@@ -18,6 +18,7 @@
 
 import org.apache.karaf.shell.api.action.Argument;
 import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.onosproject.cli.net.ConnectivityIntentCommand;
 import org.onosproject.incubator.net.virtual.NetworkId;
@@ -42,6 +43,7 @@
 
     @Argument(index = 0, name = "networkId", description = "Network ID",
             required = true, multiValued = false)
+    @Completion(VirtualNetworkCompleter.class)
     Long networkId = null;
 
     @Argument(index = 1, name = "ingressDevice",