ring: ignore pool timeout when pinging shards.
ring: ignore pool timeout when pinging shards.

HatsuneMiku3939/redis,superkinglabs/redis,HatsuneMiku3939/redis,go-redis/redis,cw2018/redis-1,jackyan/redis-1,d4rk5eed/redis,icha024/redis,eyalpost/redis,HatsuneMiku3939/redis,HatsuneMiku3939/redis,linkedin-inc/redis,vmihailenco/redis,go-redis/redis,SocialExplorerFork/redis