fix(80usrgptprio): Fix mount-fail test case.
fix(80usrgptprio): Fix mount-fail test case.

coreos/bootengine,mischief/bootengine,yuwata/bootengine,crawford/bootengine,coreos/ignition,coreos/ignition,coreos/ignition,andrejro/coreos--bootengine,mjg59/bootengine