Raise error if api umbrella process doesn't exit cleaning in tests.
Raise error if api umbrella process doesn't exit cleaning in tests.

apinf/api-umbrella,NREL/api-umbrella,apinf/api-umbrella,NREL/api-umbrella,NREL/api-umbrella,apinf/api-umbrella,NREL/api-umbrella,apinf/api-umbrella,apinf/api-umbrella