[Tracker] : Cover Testing of Operator.

[shubham-cmyk]

Right now, this operator's Test coverage is low, making it difficult to test the incoming PR and breaking changes.
This Issue is a Tracker for the incoming Test case that could be merged.

The test case could be either of

1. Unit test
2. Integration test
3. e2e Test ( we would use kuttl for this ) check

All the PRs related to the test should reference this issue.

It would be an excellent approach to work on a few test functions at a time which make the PR a bit cleaner and easier to write.

Read this for a quick start.

Worflow used : #661

[shubham-cmyk]

Currently, we have certain examples

We would like to write the write the e2e test using kuttl for redis cluster.

A sample test could be here