ipatests: stop the CA during healthcheck expiration test
Time is moved during the test to ensure that ipa-healthcheck
finds expired certificates. It's possible that certmonger will also
wake up and renew the certificates before ipa-healthcheck can
execute so shut down the CA during the test.
https://pagure.io/freeipa/issue/8463
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
Reviewed-By: Kaleemullah Siddiqui <ksiddiqu@redhat.com>