Display exit code during test cleanup (#17725)
Display exit code during test cleanup (#17725)

Lately tests have been failing for what seems like no reason. Keeping
the exit code may help debug these a bit.
smawson/istio,smawson/istio,smawson/istio,geeknoid/istio,smawson/istio,smawson/istio,geeknoid/istio,istio/istio,istio/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,istio/istio,smawson/istio,istio/istio,geeknoid/istio,istio/istio