Add self node in first cluster node response

[nidhi-ag]

Recently we faced an issue on production where predixy was throwing "MOVED" error just after the process started. After debugging found that

"Info" command output - Just after predixy got healthy (health check using ping command) Server:prod-adserver.xoptuc.clustercfg.apse1.cache.amazonaws.com:6379 Role:master Group:abbff3be959032ba777a295f9d4210a281841d51 DC: CurrentIsFail:0 Connections:5 Connect:5 Requests:249 Responses:249 SendBytes:25169 RecvBytes:4109

Server:192.168.5.176:6379 Role:slave Group:abbff3be959032ba777a295f9d4210a281841d51 DC: CurrentIsFail:0 Connections:5 Connect:5 Requests:47 Responses:47 SendBytes:2072

And after 10-30 seconds (refresh interval is 30) after predixy got healthy Server:prod-adserver.xoptuc.clustercfg.apse1.cache.amazonaws.com:6379 Role:master Group:abbff3be959032ba777a295f9d4210a281841d51 DC: CurrentIsFail:0 Connections:5 Connect:5 Requests:249 Responses:249 SendBytes:25169 RecvBytes:4109

Server:192.168.5.176:6379 Role:slave Group:abbff3be959032ba777a295f9d4210a281841d51 DC: CurrentIsFail:0 Connections:5 Connect:5 Requests:47 Responses:47 SendBytes:2072 RecvBytes:962

Server:192.168.5.46:6379 Role:master Group:abbff3be959032ba777a295f9d4210a281841d51 DC: CurrentIsFail:0 Connections:5 Connect:5 Requests:190 Responses:125 SendBytes:10775 RecvBytes:1409

After checking the code and debug logs found that "self" replica is not getting added in the pool in the first attempt. It gets added in the second call of "cluster nodes".