DATAREDIS-277 - Add support for 'SLAVEOF'.

Prepare issue branch.
DATAREDIS-277 - Add support for 'SLAVEOF'.

'SLAVEOF' and 'SLAVEOF NO ONE' are available via 'RedisConnection' and 'RedisOperations' for 'jedis', 'jredis', 'lettuce' and 'srp'.

Original Pull Request: #57