test: Split TestAutoUpdates test
test: Split TestAutoUpdates test

Move the two tests that remove dnf-automatic into its own test class.
This will allow us to run the other tests (which are not destructive) in
a persistent testbed.

Also fix setUp() to clean up after itself.

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