Support for cloud based Redis instance

[bvennam]

Problem
Currently, the set up instructions for the RedisStreamSource have us install a cluster local version of redis. We should be able to use other instances of Redis as well, for example a cloud provided Redis instance.

Persona:
Which persona is this feature for?
Event Producer & Consumer

Exit Criteria
A measurable (binary) test that would indicate that the problem has been resolved.
I am able to use a redis instance from a cloud provider instead of the locally installed sample/redis.

Time Estimate (optional):
How many developer-days do you think this may take to resolve?

Additional context (optional)
Add any other context about the feature request here.

[bvennam]

/assign @aavarghese