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";
diff --git a/cli/src/main/java/org/onosproject/cli/UpDownCompleter.java b/cli/src/main/java/org/onosproject/cli/UpDownCompleter.java
index 268b00f..a73ec42 100644
--- a/cli/src/main/java/org/onosproject/cli/UpDownCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/UpDownCompleter.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;
 
 /**
  * Up/down command completer.
  */
+@Service
 public class UpDownCompleter extends AbstractChoicesCompleter {
 
     public static final String UP = "up";
diff --git a/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java b/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java
index df7ca10..cccec10 100644
--- a/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/net/LinkDstCompleter.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.cli.net;
 
+import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.apache.karaf.shell.api.console.CommandLine;
 import org.apache.karaf.shell.api.console.Session;
 import org.apache.karaf.shell.support.completers.StringsCompleter;
@@ -29,6 +30,7 @@
 /**
  * Link destination end-point completer.
  */
+@Service
 public class LinkDstCompleter extends AbstractCompleter {
     @Override
     public int complete(Session session, CommandLine commandLine, List<String> candidates) {
diff --git a/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java b/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java
index 38842ba..27e6881 100644
--- a/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/net/LinkSrcCompleter.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.cli.net;
 
+import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.apache.karaf.shell.api.console.CommandLine;
 import org.apache.karaf.shell.api.console.Session;
 import org.apache.karaf.shell.support.completers.StringsCompleter;
@@ -28,6 +29,7 @@
 /**
  * Link source end-point completer.
  */
+@Service
 public class LinkSrcCompleter extends AbstractCompleter {
     @Override
     public int complete(Session session, CommandLine commandLine, List<String> candidates) {