RetryingTest Extension: Jitter factor

[Bukama]

From Jitter factor discussion: Idea is to add a Jitter factor for retrying tests, so the retries are not exactly executed after the same time.

[IlyasYOY]

Hello, I'd be glad to implement the feature.

I have a few questions:

• There is an existing parameter: suspendForMs.
  • Does this solve a problem?
• If the parameter described above does not solve a problem them we will have to decide how new parameter should live along with existing delay functionality.
  • We should add jitter factor to the suspend time.
  • Parameters are mutually exclusive.