BUG-1041 Make rpc-request -> xml translation use schema context

Sal-netconf-connector now uses schema context if available to transform between rpc-request represented as DOM nodes to Xml.

This is crucial for e.g. identity-ref type leaves in edit-config.

Change-Id: I5b8602e7bf21e52c27b94daa3ac55213375641b5
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
BUG-832 Fix rpcResult to xml translation to use schema for get/get-config.

The schema was never used since check if rpc qname is get/get-config was performed using == instead of equals. (Result of xtend -> java transform)

Change-Id: I057476f27b5c84b87ca9c81c51bde24990d17ff1
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge changes I057476f2,I5b8602e7

* changes:
  BUG-832 Fix rpcResult to xml translation to use schema for get/get-config.
  BUG-1041 Make rpc-request -> xml translation use schema context