Goal: 

In this task I will move Designate services from the cmd directory to cmd/eventlet and move out of that new directory only services that use threading service without causing regression.

Then I will remove eventlet from the Designate API service, including tests if there are any tests that would be impacted from this change.

Acceptance Criteria:

• Verify all services that use eventlet are in cmd/eventlet directory.
• Verify the Designate API can be run with threading and be called by the user/operator without causing regression.
• Verify unit and functional tests related to the API service pass.