Delete datasets bug fixes and integration test

[jay-m-dev]

Updated the datasets DELETE endpoint to check the status of the ai and if experiments are running before attempting to delete a dataset. Added an integration test to validate this works as expected.

[coveralls]

Pull Request Test Coverage Report for Build 6412376529

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 82.102%

---

Totals
Change from base Build 6410216974:	0.0%
Covered Lines:	4335
Relevant Lines:	5280

---

💛 - Coveralls