This commit consists of:
1) Add session management to netconf
2) Modularize the rpc call
3) Improve the error handling
4) Small bug fixes

Change-Id: I023edb76e3743b633ac87be4967d656e09e2b970
diff --git a/netconf/nc_rpc/rpc.py b/netconf/nc_rpc/rpc.py
new file mode 100644
index 0000000..3dd2f17
--- /dev/null
+++ b/netconf/nc_rpc/rpc.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 the original author or authors.
+#
+# Code adapted from https://github.com/choppsv1/netconf
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from  rpc_response import RpcResponse
+
+class Rpc(object):
+    def __init__(self,rpc_request, rpc_method, session):
+        self.rpc_request = rpc_request
+        self.rpc_method = rpc_method
+        self.rpc_response = RpcResponse()
+        self.session = session
+
+    def execute(self):
+        """ run the command - returns a OperationResponse """
+        pass
+
+    def set_rpc_response(self):
+        self.rpc_response = RpcResponse()
+
+    def _validate_parameters(self, rpc_request):
+        """Sets and validates the node as well"""
+        pass