Merge "- Added exi capability utilities, handlers and necessary modifications - Exi...

Merge "- Added exi capability utilities, handlers and necessary modifications - Exi parameters decomposition - Introduced HandlerManipulator class in netconf-api to be used for   handlers management on channel pipeline - Exi encoding/decoding test added - exi returns NetconfMessage - added DOM attributes - exi encode decode test to expect NetconfMessage instead of Document - XmlElement.getName() returns localName first and tagName if localName not present, incorporated notes from Robert - NetconfSession implements all common methods - added copyright where needed - ProtocolMessageEncoder/Decoder stored in session and replaced with Exi   enc/dec - exi encoder/decoder interface become comaptible with   ProtocoleMessageEncoder/Decoder and no longer needs to be taken care of   this handlers - created thirdParty bundle for exi - incorporation of Maros's notes"