[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/cli/src/main/java/org/onosproject/cli/net/LabelResourceCommand.java b/cli/src/main/java/org/onosproject/cli/net/LabelResourceCommand.java
index f381085..1221f23 100644
--- a/cli/src/main/java/org/onosproject/cli/net/LabelResourceCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/LabelResourceCommand.java
@@ -15,13 +15,15 @@
  */
 package org.onosproject.cli.net;
 
-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.net.DeviceId;
 import org.onosproject.incubator.net.resource.label.LabelResourcePool;
 import org.onosproject.incubator.net.resource.label.LabelResourceService;
 
+@Service
 @Command(scope = "onos", name = "label-pool",
       description = "Gets label resource pool information by a specific device id")
 public class LabelResourceCommand extends AbstractShellCommand {
@@ -33,7 +35,7 @@
             + "releaseLabelIds=%s";
 
     @Override
-    protected void execute() {
+    protected void doExecute() {
         LabelResourceService lrs = get(LabelResourceService.class);
         LabelResourcePool pool = lrs.getDeviceLabelResourcePool(DeviceId
                 .deviceId(deviceId));