Completer fixes for core ONOS CLI commands

Change-Id: Icedfc542ad93a2825b592f3deb6cd96d91779544
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 54ddfb2..984916f 100644
--- a/cli/src/main/java/org/onosproject/cli/net/GetStatisticsCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/GetStatisticsCommand.java
@@ -17,6 +17,7 @@
 
 import org.apache.karaf.shell.api.action.Argument;
 import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.net.ConnectPoint;
@@ -41,6 +42,7 @@
     @Argument(index = 0, name = "connectPoint",
               description = "Device/Port Description",
               required = true, multiValued = false)
+    @Completion(ConnectPointCompleter.class)
     String connectPoint = null;