Modify verify delete so that it bails if the task_state is 'deleting'
Do not verify if delete does not return 204
Docstring cleanups and other review comments from @lvh
Change verified_delete docstring (and some log messages) as per @manishtomar
Use partial, thanks @manishtomar
Use log_with_time and update docstring, thanks @manishtomar
Test what delete_and_verify is called with
Merge pull request #632 from rackerlabs/as-218-delete-on-task-state

AS-218 - Modify verify delete so that it bails if the task_state is 'deleting'