ISPN-3480 Use protoparser lib instead of relying on binary descriptors generated by protoc

https://issues.jboss.org/browse/ISPN-3480

Removed dependency of protoc and google descriptors. All tests passing and no perf regressions

That was the only compromise I had to make in order to use the parser. But given how easy is the workaround and the fact that groups are deprecated, I've just killed them :)