Let's fail if `cf apps` fails
Let's fail if `cf apps` fails

We were missing this error in CI. Better to be notified.

[#177856800]

Co-authored-by: Kieron Browne <c440ca4001e1bac635249757b129604e7589fc3c@vmware.com>

cloudfoundry-incubator/guardian-release,cloudfoundry-incubator/guardian-release,cloudfoundry-incubator/guardian-release