ipatests: fix fedora29 nightly definition
    
    test_sssd is using a wrong dependency (fedora30 build instead
    of fedora29 build). As a result, this test is not triggered
    by PRCI because it's waiting forever for a dependency.
    (See the status: fedora-30/test_sssd Pending — unassigned)
    
    Fix the version in the fedora 29 nightly definition.
    
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>