[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/cli/src/main/java/org/onosproject/cli/net/GetStatisticsCommand.java b/cli/src/main/java/org/onosproject/cli/net/GetStatisticsCommand.java
index 12e92c6..54ddfb2 100644
--- a/cli/src/main/java/org/onosproject/cli/net/GetStatisticsCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/GetStatisticsCommand.java
@@ -15,8 +15,9 @@
  */
 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.ConnectPoint;
 import org.onosproject.net.DeviceId;
@@ -32,6 +33,7 @@
 /**
  * Fetches statistics.
  */
+@Service
 @Command(scope = "onos", name = "get-stats",
          description = "Fetches stats for a connection point")
 public class GetStatisticsCommand extends AbstractShellCommand {
@@ -43,7 +45,7 @@
 
 
     @Override
-    protected void execute() {
+    protected void doExecute() {
         StatisticService service = get(StatisticService.class);
 
         DeviceId ingressDeviceId = deviceId(getDeviceId(connectPoint));