IPA-EPN: Test suite.
    
    Initial test suite for EPN.
    
    Fixes: https://pagure.io/freeipa/issue/3687
    Signed-off-by: François Cami <fcami@redhat.com>
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>