[PATCH v2] replication: fix bug with zero replication_connect_quorum

[Vladimir Davydov]

The patch looks good to me.

On Mon, Apr 09, 2018 at 01:35:30PM +0300, Konstantin Belyavskiy wrote:
> If 'box.cfg.read_only' is false, 'replication' defines at least one
> replica (other than itself), but they are not available at the time
> of box.cfg execution and replication_connect_quorum is set to zero,
> master displays 'orphan' status instead of 'running' since logic
> which cnange this state is executed only after successfull connection.
> 

> Changes in v2:
> Change test to @locker version.
> 
> ticket: https://github.com/tarantool/tarantool/issues/3278
> branch: https://github.com/tarantool/tarantool/compare/gh-3278-fix-bug-with-zero-replication-connect-quorum

This should go after --- below (it is ignored by git-am then).

> 
> Closes #3278
> ---
>  src/box/replication.cc                 |  8 +++--
>  test/replication/quorum.result         | 66 ++++++++++++++++++++++++++++++++++
>  test/replication/quorum.test.lua       | 22 ++++++++++++
>  test/replication/replica_no_quorum.lua | 11 ++++++
>  4 files changed, 105 insertions(+), 2 deletions(-)
>  create mode 100644 test/replication/replica_no_quorum.lua