Add Redis Sentinel support through Provider for JedisSentinelPool

[kliewkliew]

[lightbend-cla-validator]

Hi @kliewkliew,

Thank you for your contribution! We really value the time you've taken to put this together.

Before we proceed with reviewing this pull request, please sign the Typesafe Contributors License Agreement:

http://www.lightbend.com/contribute/cla

[kliewkliew]

I have signed the agreement