test: cleanup and remove test user after TestRoles.testBasic
test: cleanup and remove test user after TestRoles.testBasic

Mark the test as non destructive which cleans up the user's home
directory and restores /etc/passwd.

mvollmer/cockpit,martinpitt/cockpit,cockpit-project/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,cockpit-project/cockpit,mvollmer/cockpit,mvollmer/cockpit,martinpitt/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,mvollmer/cockpit,martinpitt/cockpit