etcdserver: cherry pick of #9990 to release 3.1#10030

Merged

jpbetz merged 2 commits intoetcd-io:release-3.1from jingyih:cherry-pick-of-#9990-origin-release-3.1

Aug 20, 2018

+114-5

Commits on Aug 20, 2018

etcdserver: add grpc interceptor to log info on incoming request to etcdserver.
Jingyi Hu
committed
etcdserver: add grpc interceptor to log info on incoming request to
Jingyi Hu
committed