Ticket 48413 - Improvements to lib389 for rest
    
    Bug Description:  This improves a number of our resources for making rest389
    easier to develop.
    
    Fix Description:  The key change is in mapped_object, allowing any call to a
    _json() to automatically map to the prefix, then wrapping the results.
    
    https://fedorahosted.org/389/ticket/48413
    
    Author: wibrown
    
    Review by: mreynolds (Thanks!)