Run ctr synchronously to avoid flakey timeouts
Run ctr synchronously to avoid flakey timeouts

Co-authored-by: Kieron Browne <c440ca4001e1bac635249757b129604e7589fc3c@pivotal.io>

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