Convenience dispatcher to the error_exit() method.

    Will raise "warning" error, i.e. script processing continues.

def warn( callingClass, astr_key, **kwargs ):
    '''
    Convenience dispatcher to the error_exit() method.

    Will raise "warning" error, i.e. script processing continues.
    '''
    kwargs['exitToOS']  = False
    report( callingClass, astr_key, **kwargs )