Set Redis timeouts

[elgris]

As a ZMON user
I want to be sure that ZMON fails fast if Redis is not present or is responding slowly
So the behaviour is more predictable

Acceptance criteria

• Redis configuration includes timeout. Default: 2000msec, for both Read and Write redis
• Redis configuration includes "time to wait for a connection from the pool". Default: -1, for both Read and Write redis

[rajatparida86]

Go through the PR - 487 and resolve the conflicts