Completer fixes for core ONOS CLI commands

Change-Id: Icedfc542ad93a2825b592f3deb6cd96d91779544
diff --git a/cli/src/main/java/org/onosproject/cli/net/DeviceControllersCommand.java b/cli/src/main/java/org/onosproject/cli/net/DeviceControllersCommand.java
index ea39249..0a25b37 100644
--- a/cli/src/main/java/org/onosproject/cli/net/DeviceControllersCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/DeviceControllersCommand.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.DeviceId;
@@ -34,6 +35,7 @@
 
     @Argument(index = 0, name = "uri", description = "Device ID",
             required = true, multiValued = false)
+    @Completion(DeviceIdCompleter.class)
     String uri = null;
     private DeviceId deviceId;