Completer fixes for core ONOS CLI commands

Change-Id: Icedfc542ad93a2825b592f3deb6cd96d91779544
diff --git a/cli/src/main/java/org/onosproject/cli/MetricNameCompleter.java b/cli/src/main/java/org/onosproject/cli/MetricNameCompleter.java
index 31ac4ff..62734f5 100644
--- a/cli/src/main/java/org/onosproject/cli/MetricNameCompleter.java
+++ b/cli/src/main/java/org/onosproject/cli/MetricNameCompleter.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.cli;
 
+import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.onlab.metrics.MetricsService;
 
 import java.util.ArrayList;
@@ -23,6 +24,7 @@
 /**
  * Metric name completer.
  */
+@Service
 public class MetricNameCompleter extends AbstractChoicesCompleter {
 
     @Override