Added test case for delete bucket and backend with failed scenarios.#967

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click2cloud-rajat wants to merge 4 commits intosodafoundation:developmentfrom

Click2Cloud:test_delete_backend_bucket_failed_scenarios

Commits on May 19, 2020

Added junit test framework with gradle build.
Click2cloud-Wadhai
committed

Commits on May 20, 2020

Added test case for negative scenarios for bucket and backend.
Click2cloud-Pathak
committed

Commits on May 22, 2020

Added test case for verifying backend list and failed backend and bucket scenarios.
Click2Cloud-Faizan
committed
Added test case for delete bucket and backend with failed scenarios. Also used common code for get bucket name.
click2cloud-rajat
committed