MIGRATE: fix default timeout to 1000 milliseconds.
MIGRATE: fix default timeout to 1000 milliseconds.

When a timeout <= 0 is provided we set a default timeout of 1 second.
It was set to 1 millisecond for an error resulting from a recent change.

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