[MESOS-1203]: Shade protobuf dependency in Mesos Java library

Applied patch from:
    https://reviews.apache.org/r/20329/diff/raw/

[ticket: MESOS-1203]: https://issues.apache.org/jira/browse/MESOS-1203

Author      : benh
Reviewer    : pwendell, vinodkone
Testing     : berngp