Creates a folder in Exchange. ::

      calendar = service.folder().new_folder(
        display_name=u"New Folder Name",
        folder_type="CalendarFolder",
        parent_id='calendar',
      )
      calendar.create()

def create(self):
    """
    Creates a folder in Exchange. ::

      calendar = service.folder().new_folder(
        display_name=u"New Folder Name",
        folder_type="CalendarFolder",
        parent_id='calendar',
      )
      calendar.create()
    """

    self.validate()
    body = soap_request.new_folder(self)

    response_xml = self.service.send(body)
    self._id, self._change_key = self._parse_id_and_change_key_from_response(response_xml)

    return self