test: Ignore DBus disconnect messages when restarting
test: Ignore DBus disconnect messages when restarting

When restarting the system, we can ignore DBus message disconnect
requests.

Closes #9443
mareklibra/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,garrett/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,deryni/cockpit,martinpitt/cockpit,deryni/cockpit,SotolitoLabs/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,mareklibra/cockpit,mvollmer/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,deryni/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mareklibra/cockpit,mvollmer/cockpit,cockpituous/cockpit,andreasn/cockpit,mareklibra/cockpit,mareklibra/cockpit,mvollmer/cockpit,deryni/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,cockpit-project/cockpit,garrett/cockpit,deryni/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,garrett/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,garrett/cockpit,andreasn/cockpit,cockpituous/cockpit,mvollmer/cockpit,deryni/cockpit,andreasn/cockpit,garrett/cockpit,moraleslazaro/cockpit,andreasn/cockpit,cockpituous/cockpit,mareklibra/cockpit,cockpituous/cockpit,andreasn/cockpit,andreasn/cockpit,deryni/cockpit,mvollmer/cockpit