Multiple threads to handle parallel Redis reactive commands

[rjaros87]

Issue description

I'm using StatefulRedisConnection with RedisReactiveCommands. I see in java profiler, each and every command goes through only one lettuce-epollEventLoop thread.

Is it possible to have more threads to handle commands in parallel? I've tried to play with redis.io-thread-pool-size and redis.computation-thread-pool-size, but nothing's changed.

Is it even possible to achieve to have multiple threads to handle such commands in parallel or am I doing something wrong? Any advice would be helpful.
Is it maybe somehow related to #216 ?

Thanks in advance.