Refs #76: since we bump repl_proto_ver, we dont need to bump gcs_proto_ver.
Merge codership/gh76 upto 40fbad7b640c5077f9d1cbf7f9f5d3e88c8b28e3
Merge codership/gh76 upto 40fbad7b640c5077f9d1cbf7f9f5d3e88c8b28e3