dcm-list-api-versions doesn't respect DCM_VERIFY_SSL=0

[igable]

Running against a DCM enpoint with a self signed cert:

(mixcoatl)➜  mixcoatl git:(feature/fix-dcm-create-account) ✗ dcm-list-api-versions
Traceback (most recent call last):
  File "/Users/igable/code/mixcoatl/bin/dcm-list-api-versions", line 6, in <module>
    exec(compile(open(__file__).read(), __file__, 'exec'))
  File "/Users/igable/code/mixcoatl/mixcoatl/bin/dcm-list-api-versions", line 43, in <module>
    thelist = endpoint.supported_api_versions()
  File "/Users/igable/code/mixcoatl/mixcoatl/mixcoatl/resource.py", line 222, in supported_api_versions
    self._load_api_versions()
  File "/Users/igable/code/mixcoatl/mixcoatl/mixcoatl/resource.py", line 201, in _load_api_versions
    result = r.get(url,headers=headers)
  File "/Users/igable/code/mixcoatl/lib/python2.7/site-packages/requests-2.7.0-py2.7.egg/requests/api.py", line 69, in get
    return request('get', url, params=params, **kwargs)
  File "/Users/igable/code/mixcoatl/lib/python2.7/site-packages/requests-2.7.0-py2.7.egg/requests/api.py", line 50, in request
    response = session.request(method=method, url=url, **kwargs)
  File "/Users/igable/code/mixcoatl/lib/python2.7/site-packages/requests-2.7.0-py2.7.egg/requests/sessions.py", line 465, in request
    resp = self.send(prep, **send_kwargs)
  File "/Users/igable/code/mixcoatl/lib/python2.7/site-packages/requests-2.7.0-py2.7.egg/requests/sessions.py", line 573, in send
    r = adapter.send(request, **kwargs)
  File "/Users/igable/code/mixcoatl/lib/python2.7/site-packages/requests-2.7.0-py2.7.egg/requests/adapters.py", line 431, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)