Fix resource pagination

[lamenezes]

Currently listing events or issues that surpasses the page limit leads to an infinite loop. That's because the "next" page never is accessed only the first one. This is showed below:

    events = self.api.project_events.list(organization, project)
    all_events.extend(events.body)

    links = parse_header_links(events.headers.get('Link'))
    while links[1]['results'] == 'true':
        events = self.api.project_events.list(organization, project)  # same page is accessed
        all_events.extend(events.body)
        # links is never updated