Added delete_engine_wait function that completes once an engine is completely deleted#129

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Anatoli/RAI-14127

Commits on Jul 6, 2023

added delete_engine_wait function that completes once an engine is deleted, added tests for engine API
Anatoli Kurtsevich
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Commits on Jul 7, 2023

added engine states enum, updated create and delete engine wait API to properly use engine states to determine when the operation is complete
Anatoli Kurtsevich
committed
modified the delete_engine_wait test to check the engine gets deleted
Anatoli Kurtsevich
committed

Commits on Jul 18, 2023

converted integration tests for Test API to unit tests
Anatoli Kurtsevich
committed
removed an empty line
Anatoli Kurtsevich
committed