redis-trib.rb: MIGRATE hardcoded timeout set to 15 sec.
redis-trib.rb: MIGRATE hardcoded timeout set to 15 sec.

Will be configurable / adaptive at some point but let's start with a
saner value compared to 1 sec which is not a good idea for big data
structures stored into a single key.

JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis