Remove xfail from CALes test test_http_intermediate_ca
    
    The full chain is not required by mod_ssl.
    
    https://pagure.io/freeipa/issue/7489
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Alexey Slaykovsky <alexey@slaykovsky.com>