Now checking for at least 2 healthy rdonly instances in workers.
That way we don't consume the last rdonyl instance and possibly
cause an outage.
Small rename.
Merge branch 'master' into resharding
Fixing tablet names after Ammar's changes.
Merge pull request #221 from youtube/resharding

Now checking for at least 2 healthy rdonly instances in workers.
Merge branch 'master' into replication