Ticket 48273 - Improve valgrind functions
    
    Description:  The previous valgrind functions were very limited in what you could do.
                  Now, you can get the resutls file,m adn check it mulitple times, as
                  well as pass in multiple pattern strings to check for in a single stack
                  trace.
    
                  Also added some helper constants for the memory leak or invalid access
                  stacks.
    
    https://fedorahosted.org/389/ticket/48273
    
    Reviewed by: nhosoi(Thanks!)