[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualHostRemoveCommand.java b/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualHostRemoveCommand.java
index a496e38..4d3370d 100644
--- a/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualHostRemoveCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/vnet/VirtualHostRemoveCommand.java
@@ -16,8 +16,9 @@
 
 package org.onosproject.cli.net.vnet;
 
-import org.apache.karaf.shell.commands.Argument;
-import org.apache.karaf.shell.commands.Command;
+import org.apache.karaf.shell.api.action.Argument;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.incubator.net.virtual.NetworkId;
 import org.onosproject.incubator.net.virtual.VirtualNetworkAdminService;
@@ -28,6 +29,7 @@
  * Removes a virtual host.
  */
 
+@Service
 @Command(scope = "onos", name = "vnet-remove-host",
         description = "Removes a virtual host.")
 public class VirtualHostRemoveCommand extends AbstractShellCommand {
@@ -41,7 +43,7 @@
     String id = null;
 
     @Override
-    protected void execute() {
+    protected void doExecute() {
         VirtualNetworkAdminService service = get(VirtualNetworkAdminService.class);
         service.removeVirtualHost(NetworkId.networkId(networkId), HostId.hostId(id));
         print("Virtual host successfully removed.");