Fix duplicate replicas issue. (#8481)
Fix duplicate replicas issue. (#8481)

We need to store replicas referenced by their announced address (IP or
address). Before that, if hostnames were used and the IP address
changed, duplicate entries would have been created.
neomantra/redis,antirez/redis,PKRoma/redis,neomantra/redis,oranagra/redis,soloestoy/redis,soloestoy/redis,antirez/redis,PKRoma/redis,ofirluzon/redis,yossigo/redis,ofirluzon/redis,ofirluzon/redis,charsyam/redis,yossigo/redis,soloestoy/redis,ofirluzon/redis,oranagra/redis,neomantra/redis,charsyam/redis,soloestoy/redis,oranagra/redis,charsyam/redis,oranagra/redis,neomantra/redis,antirez/redis,antirez/redis,charsyam/redis,ctripcorp/redis,ctripcorp/redis,yossigo/redis,PKRoma/redis,yossigo/redis,yossigo/redis,PKRoma/redis,soloestoy/redis,ofirluzon/redis,charsyam/redis,PKRoma/redis,ctripcorp/redis,oranagra/redis,neomantra/redis,ctripcorp/redis