drill

2c3e2de2 - DRILL-6642: Update protocol-buffers version

DRILL-6642: Update protocol-buffers version 1. Updated protobuf to version 3.6.1 2. Added protobuf to the root pom dependency management 3. Added classes BoundedByteString and LiteralByteString for compatibility with HBase 4. Added ProtobufPatcher to provide compatibility with MapR-DB and HBase closes #1639