ipatests: refactor test_ipa_cert_fix with tasks
Fixes: https://pagure.io/freeipa/issue/8932
Signed-off-by: François Cami <fcami@redhat.com>
Reviewed-By: Michal Polovka <mpolovka@redhat.com>
Reviewed-By: Armando Neto <abiagion@redhat.com>
Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>