Spec Improvements: Cleanup API Logs after each controllers test

[Ivanov-Anton]

Clean up the API Logs table after each controller/requests test.

Since we introduced the new feature (YETIWEB-1396, Async writing to API log), the API logs are not reverted by postgres within transaction inside test env because the API log is created within a separate Thread. Therefore, the API logs table grows and the number of records grows during API testing.

I suggest using this cleanup in general for all API specifications to ensure that each test is not affected to another test and its precondition.