Automate creation of SRDF Group

[delldubey]

Description

Adds feature to create SRDFG automatically if it is not present in the storage class.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#411

Checklist:

• Have you run format,vet & lint checks against your submission?
• Have you made sure that the code compiles?
• Did you run the unit & integration tests successfully?
• Have you maintained at least 90% code coverage?
• Have you commented your code, particularly in hard-to-understand areas
• Have you done corresponding changes to the documentation
• Did you run tests in a real Kubernetes cluster?
• Backward compatibility is not broken

How Has This Been Tested?

• Cluster Tests
• Unit Tests
  544 scenarios (544 passed)
  3865 steps (3865 passed)
  4m1.7105473s
  PASS ok