test: Make TestUpdates.testNoPackageKit non-destructive
test: Make TestUpdates.testNoPackageKit non-destructive

So that it can be run on persistent testbeds.

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