Tests: Fix regex errors in integration trust tests
    
    In integration trust tests some values are checked using regular expressions.
    Some of these expressions from recently added coverage have minor mistakes
    which causes the comparisons to fail. Providing fix for these regular
    expressions.
    
    https://fedorahosted.org/freeipa/ticket/6285
    
    Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>