ipatests: enable 389-ds audit log and collect audit file
    
    In test_integration, enable 389-ds audit log and auditfail log by setting
    nsslapd-auditlog-logging-enabled: on
    nsslapd-auditfaillog-logging-enabled: on
    
    and collect the generated audit file. This will help troubleshoot failures
    related to DS.
    
    Fixes: https://pagure.io/freeipa/issue/8064
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>