RedisOperations::slaveOf deprecated

[toddmerrill]

In the Redis documentation I see 'slaveof' is deprecated for 'replicaof': https://redis.io/commands/slaveOf We should deprecate the 'slaveOf' and 'slaveOfNoOne' methods in RedisOperations and add new 'replicaOf' and 'replicaOfNoOne' methods.

[mp911de]

None of the drivers (Jedis, Lettuce) support this command. Can you file tickets there? Once we have the pre-requisites in place, we can continue here.

[christophstrobl]

Merged to 3.0.x via #2276.