Issue 49761 - Fix CI tests
    
    Fix Description:
    
    * Remove checks for some of the expected logs that are no longer present after
      https://pagure.io/389-ds-base/issue/51076
    * Use a fixture for disabling/enabling access log buffering
    
    Relates: https://pagure.io/389-ds-base/issue/49761
    
    Reviewed by: spichugi (Thanks!)