Ticket 48949 - change default file path generation - use os.path.join
    
    Bug Description:  Our path manipulation was done based on strings. This resulted
    in a number of key locations being listed as //..../thing//file. This is not
    very clean or professional, and may cause some issues with other tools.
    
    Fix Description:  swap to using the python os.path.join mechanism which is able
    to handle this correctly.
    
    https://fedorahosted.org/389/ticket/48949
    
    Author: xaellia
    
    Review by: wibrown