ipatests: check that EPN's configuration file is installed.
Fixes: https://pagure.io/freeipa/issue/8374
Signed-off-by: François Cami <fcami@redhat.com>
Reviewed-By: Alexander Bokovoy <abbra@users.noreply.github.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>