Amend setting role.

[doyoubi]

Now the replicator module just keeps sending SLAVEOF command to the backend Redis, resulting in the following log in Redis triggered again and again:

REPLICAOF would result into synchronization with the master we are already connected with. No operation performed.

Maybe we need to check whether the role is incorrect. But the address in ROLE is replica-announce-ip. We need to use CONFIG GET to get the replica-annoucne-ip first from the peer master.