':param header_list: A list of tuples with (header,value) to be added
to every request.
:return: nothing'

def set_header_list(self, header_list):

    for (h, v) in header_list:
        self.header_list.append((h, v))
        om.out.debug(('Added    the    following    header:    "%s:    %s"' % (h, v)))
