Ticket 49024 - Fix paths in tools module
    
    Description: Now we have paths module, so we can adjusted obsolete
    hardcoded DS paths and fix some test failures with it.
    
    Also, fix small issues with:
    - ds-admin.pl variables;
    - unsafe and consice command execution;
    - fix lib dir path to the path in defaults.inf file
    
    https://fedorahosted.org/389/ticket/49024
    
    Reviewd by: nhosoi, wbrown (Thanks!)