Issue 49761 - Fix CI test suite issues
    
    Bug Description:
    RootDN plugin test was failing because of a race condition: existing
    connection was reused to test allow/deny rules.
    
    Fix Description:
    Refactor test to use direct ldap connection instead of topology's bind.
    
    Relates https://pagure.io/389-ds-base/issue/49761
    
    Reviewed by: mreynolds (Thanks!)