Completer fixes for core ONOS CLI commands

Change-Id: Icedfc542ad93a2825b592f3deb6cd96d91779544
diff --git a/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java b/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java
index 3b164d4..678ae10 100644
--- a/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/net/RegionUpdateCommand.java
@@ -21,8 +21,10 @@
 import com.google.common.collect.Sets;
 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.cli.NodeIdCompleter;
 import org.onosproject.cluster.NodeId;
 import org.onosproject.net.region.Region;
 import org.onosproject.net.region.RegionAdminService;
@@ -50,6 +52,7 @@
 
     @Argument(index = 0, name = "id", description = "Region ID",
             required = true, multiValued = false)
+    @Completion(RegionIdCompleter.class)
     String id = null;
 
     @Argument(index = 1, name = "name", description = "Region Name",
@@ -59,11 +62,13 @@
     @Argument(index = 2, name = "type", description = "Region Type (CONTINENT|" +
             "COUNTRY|METRO|CAMPUS|BUILDING|FLOOR|ROOM|RACK|LOGICAL_GROUP)",
             required = true, multiValued = false)
+    @Completion(RegionTypeCompleter.class)
     String type = null;
 
     @Argument(index = 3, name = "masters", description = "Region Master, a set " +
     "of nodeIds should be split with '/' delimiter (e.g., 1 2 3 / 4 5 6)",
             required = true, multiValued = true)
+    @Completion(NodeIdCompleter.class)
     List<String> masterArgs = null;
 
     @Override