Skip a test which is failing due to BZ 1173742

Issuing an HTTP GET request to `/api/v2` should return a set of paths in this
format:

    {
        u'content_views': {
            u'…': u'/katello/api/content_views/:id',
            u'…': u'/katello/api/content_views/:id/available_puppet_modules',
            u'…': u'/katello/api/organizations/:organization_id/content_views',
            u'…': u'/katello/api/organizations/:organization_id/content_views',
        },
        u'…': {…}
    }

A response in this format is actually returned:

    u'List filters': u'/katello/api/content_views/:content_view_id/filters',
    u'List gpg keys': u'/katello/api/gpg_keys',
    u'List host collections': u'/katello/api/host_collections',

The above issue occurs only on recent composes. It does not occur in older
composes or upstream (Foreman).

Test result when run against a recent compose:

    $ nosetests tests/foreman/smoke/test_api_smoke.py -m test_get_links
    .
    ----------------------------------------------------------------------
    Ran 1 test in 1.863s

    OK

Test result when run against upstream:

    $ nosetests tests/foreman/smoke/test_api_smoke.py -m test_get_links
    S
    ----------------------------------------------------------------------
    Ran 1 test in 0.915s

    OK (SKIP=1)