null provider changes for karaf 4.2.1 CLI

Change-Id: Iee039332a1ff00f7957b58a8bf9c320fba974e15
diff --git a/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java b/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java
index 42b4e95..71ad389 100644
--- a/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/StartStopCompleter.java
@@ -16,12 +16,14 @@
 package org.onosproject.cli;
 
 import com.google.common.collect.ImmutableList;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
 
 import java.util.List;
 
 /**
  * Start/stop command completer.
  */
+@Service
 public class StartStopCompleter extends AbstractChoicesCompleter {
 
     public static final String START = "start";