This commit consists of:
1) Parsing protobuf responses from Voltha into a dict which will also
   include the yang proto annotations
2) Converting a protobuf response into a yang-compatible XML format
3) Support for GET (no request params) for Voltha, VolthaInstance and VolthaInstances
4) Minor bug fixes
5) Testing done using the MG-Soft Netconf client

Change-Id: Ibb7f62a391e19b0240cc739919fccc689a316005
diff --git a/netconf/nc_rpc/base/validate.py b/netconf/nc_rpc/base/validate.py
index 93faf60..8671b12 100644
--- a/netconf/nc_rpc/base/validate.py
+++ b/netconf/nc_rpc/base/validate.py
@@ -23,9 +23,8 @@
 
 class Validate(Rpc):
 
-	def __init__(self, rpc_request, rpc_method, grpc_client, session):
-		super(Validate, self).__init__(rpc_request, rpc_method,
-									   grpc_client, session)
+	def __init__(self, request, grpc_client, session):
+		super(Validate, self).__init__(request, grpc_client, session)
 		self._validate_parameters()
 
 	def execute(self):