Let primary own its replication group#25692

Merged

ywelsch merged 7 commits intoelastic:masterfrom ywelsch:enhance/gcptracker-coordinator

Jul 14, 2017

+686-630

Commits on Jul 12, 2017

GCP coordinates replication and recovery
ywelsch
committed

Commits on Jul 13, 2017

Take relocating shards into account for BWC
ywelsch
committed