Convenience method that round input to valid ScaleIO Volume size (8GB increments)
        :param volsize: Size in MB
        :rtype int: Valid ScaleIO Volume size rounded to nearest 8GB increment above or equal to volsize

def is_valid_volsize(self,volsize):
        """
        Convenience method that round input to valid ScaleIO Volume size (8GB increments)
        :param volsize: Size in MB
        :rtype int: Valid ScaleIO Volume size rounded to nearest 8GB increment above or equal to volsize
        """
        
        if type(volsize) is int:
            size_temp = divmod(volsize, 8192)
            if size_temp[1] > 0: # If not on 8GB boundary
                return int((1 + size_temp[0]) * 8192) # Always round to next 8GB increment
        else:
            return int(volsize)