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

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