This commit consists of:
1) Update the existing tests to use enable instead of activate
2) Add the required interface methods to pmcs
3) Update the voltha.proto to have the correct delete method
4) Comment out some code in config_node to prevent an additional
   item to be queued on the main branch.  This new item was preventing
   any device updates (assert failed because that item was queued but
   not consumed).  Further debugging would be required before that code
   can be reintegrated.

Change-Id: I4fa75ea6531f496a8cf8233f2e78c0076c3b23a1
diff --git a/cli/main.py b/cli/main.py
index 3d9de58..05cee3b 100755
--- a/cli/main.py
+++ b/cli/main.py
@@ -284,7 +284,7 @@
         pre-provisioned device.
         """
         device_id = line or self.default_device_id
-        self.poutput('activating {}'.format(device_id))
+        self.poutput('enabling {}'.format(device_id))
         stub = voltha_pb2.VolthaLocalServiceStub(self.get_channel())
         stub.EnableDevice(voltha_pb2.ID(id=device_id))