Cancel fsm alternative

Still waiting for CI

Running the slow suites twice to see if any of them hang in catchup while they should be shutting down (such as was the case at http://cislave11.incubaid.com/jenkins/jobs/jenkins-arakoon-git-system-tests-slow-SHAKY-78/home/jenkinslxc/qbase3/var/tmp/arakoon_system_tests/test_sso_deployment/sturdy_2/log/ ).

Will post a comment when CI has finished.