New parser can't handle "}}" sequence

Topoprocessing jenkins jobs started failing after ODL switched to use the new yang parser.

During debugging we found that this issue is related to syntax. After brief discussion with Martin Ciglan we found out, that the new parser can't handle "}}" sequence. Ending brackets must be separated to work corrrectly.

We updated our models, but I still think this might happen in other models / projects - therefore it is a bug in the parser and it would be nice if it was fixed.