CORD-613 Adding ability to administratively enable or disable a port via CLI.
Currently uses the OpenFlow device provider to change portState.
Also fixes a bug in PortNumberCompleter.
Adds completion options to portstats for deviceId and portNumber.

Change-Id: Idcce775fe8bc5484fdd0e630bcb5026b85125478
diff --git a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
index 6025e07..1ad4025 100644
--- a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
+++ b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
@@ -34,6 +34,7 @@
 import org.onosproject.net.Device;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.MastershipRole;
+import org.onosproject.net.PortNumber;
 import org.onosproject.net.SparseAnnotations;
 import org.onosproject.net.behaviour.PortDiscovery;
 import org.onosproject.net.config.ConfigFactory;
@@ -250,6 +251,12 @@
         }
     }
 
+    @Override
+    public void changePortState(DeviceId deviceId, PortNumber portNumber,
+                                boolean enable) {
+        // TODO if required
+    }
+
     private class InnerNetconfDeviceListener implements NetconfDeviceListener {