BUG-732 Fix sal-netconf-connector unable to download schemas

BUG#1 NetconfDeviceListener used wrong method to parse rpc results
BUG#2 Parsing rpc result in NetconfMapping was looking for schema to response even if it was not needed
BUG#3 Netconf client sent base netconf capability in wrong format

Change-Id: I4798b29bb8cd7361d24188b6d5ac40a612a0c6c8
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Merge "BUG-732 Fix sal-netconf-connector unable to download schemas"