test: Adjust Ostree tests for new rpm-ostree on rhel-atomic
test: Adjust Ostree tests for new rpm-ostree on rhel-atomic

The current rhel-atomic now also picked up the new rpm-ostree with the
changed rollback behaviour, see commit 4c18e519c9.

Closes #9743

moraleslazaro/cockpit,moraleslazaro/cockpit,deryni/cockpit,garrett/cockpit,cockpituous/cockpit,cockpituous/cockpit,martinpitt/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,deryni/cockpit,andreasn/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,andreasn/cockpit,mvollmer/cockpit,andreasn/cockpit,cockpit-project/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpituous/cockpit,deryni/cockpit,cockpit-project/cockpit,andreasn/cockpit,garrett/cockpit,deryni/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,andreasn/cockpit,garrett/cockpit,andreasn/cockpit,mvollmer/cockpit,mvollmer/cockpit,deryni/cockpit,andreasn/cockpit,garrett/cockpit,cockpituous/cockpit,cockpituous/cockpit,deryni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,martinpitt/cockpit,garrett/cockpit,mvollmer/cockpit