Improve error output if redis fails to start for tests.
Improve error output if redis fails to start for tests.

NREL/api-umbrella,apinf/api-umbrella,NREL/api-umbrella-gatekeeper,NREL/api-umbrella,apinf/api-umbrella,apinf/api-umbrella,apinf/api-umbrella,OdiloOrg/api-umbrella-gatekeeper,NREL/api-umbrella,apinf/api-umbrella,NREL/api-umbrella,cmc333333/api-umbrella-gatekeeper