* Work on raft backend

* Add logstore locally

* Add encryptor and unsealable interfaces

* Add clustering support to raft

* Remove client and handler

* Bootstrap raft on init

* Cleanup raft logic a bit

* More raft work

* Work on TLS config

* More work on bootstrapping

* Fix build

* More work on bootstrapping

* More bootstrapping work

* fix build

* Remove consul dep

* Fix build

* merged oss/master into raft-storage

* Work on bootstrapping

* Get bootstrapping to work

* Clean up FMS and node-id

* Update local node ID logic

* Cleanup node-id change

* Work on snapshotting

* Raft: Add remove peer API (#906)

* Add remove peer API

* Add some comments

* Fix existing snapshotting (#909)

* Raft get peers API (#912)

* Read raft configuration

* address review feedback

* Use the Leadership Transfer API to step-down the active node (#918)

* Raft join and unseal using Shamir keys (#917)

* Raft join ...

Bump the Elasticsearch db dependency to latest, to pull in fixes to satisfy dbplugin.Database interface (#6929)

Merging despite the TravisCI tests failing, which do not support go modules

Also pull the latest into the local vendor

gRPC updated to 1.20.1 which fixes a couple of important bugs.

Updates protos as well.

* Switch to go modules

* Make fmt