Redis Feature Requester doesn't allow to set up connection timeout

[jjozefowicz]

Redis Feature Requester doesn't allow to set up connection timeout - therefore on any connectivity problems it waits unnecesarily 5 seconds.
Predis itself supports 'timeout' flag, float value - https://github.com/nrk/predis/wiki/Connection-Parameters

[eli-darkly]

Thanks for the PR. It'll go out in the next release and I'll close this issue then.

[eli-darkly]

This is in the 3.5.0 release.