Exit status is zero when server connection fails

Output example:
 Workflow Test: 'sacurine' ... 2018-02-27 18:45:58,024 [wft4galaxy.common] [DEBUG]  Loading workflow definition from file: /data_input/workflow.ga
2018-02-27 18:45:58,028 [wft4galaxy.common] [DEBUG]  Workflow definition loaded from file: done
2018-02-27 18:45:58,028 [wft4galaxy.common] [DEBUG]  Uploading the Workflow to the Galaxy instance ...
2018-02-27 18:45:58,031 [urllib3.connectionpool] [DEBUG]  Starting new HTTPS connection (1): publicdev.phenomenal-h2020.u
ERROR (4.936s)

======================================================================
ERROR [4.936s]: Workflow Test: 'sacurine'
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/wft4galaxy-0.3-py2.7.egg/wft4galaxy/runner.py", line 477, in run_test
    workflow = self.get_galaxy_workflow()
  File "/usr/lib/python2.7/site-packages/wft4galaxy-0.3-py2.7.egg/wft4galaxy/runner.py", line 441, in get_galaxy_workflow
    workflow_name_suffix=self.uuid
  File "/usr/lib/python2.7/site-packages/wft4galaxy-0.3-py2.7.egg/wft4galaxy/common.py", line 224, in load_workflow
    workflow_name, workflow_name_prefix, workflow_name_suffix)
  File "/usr/lib/python2.7/site-packages/wft4galaxy-0.3-py2.7.egg/wft4galaxy/common.py", line 247, in load_workflow_by_filename
    wf = self._galaxy_instance.workflows.import_new(wf_json)
  File "/usr/lib/python2.7/site-packages/bioblend/galaxy/objects/client.py", line 263, in import_new
    wf_info = self.gi.workflows.import_workflow_dict(wf_dict, publish)
  File "/usr/lib/python2.7/site-packages/bioblend/galaxy/workflows/__init__.py", line 107, in import_workflow_dict
    return self._post(url=url, payload=payload)
  File "/usr/lib/python2.7/site-packages/bioblend/galaxy/client.py", line 152, in _post
    files_attached=files_attached)
  File "/usr/lib/python2.7/site-packages/bioblend/galaxyclient.py", line 137, in make_post_request
    timeout=self.timeout)
  File "/usr/lib/python2.7/site-packages/requests/api.py", line 112, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 508, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 618, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 508, in send
    raise ConnectionError(e, request=request)
ConnectionError: HTTPSConnectionPool(host='publicdev.phenomenal-h2020.u', port=443): Max retries exceeded with url: /api/workflows/upload?key=946143e4f5ef858e9d10879f9b81e43c (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f0544b3be90>: Failed to establish a new connection: [Errno 111] Connection refused',))

----------------------------------------------------------------------
Ran 1 test in 4.937s

FAILED (errors=1)
2018-02-27 18:46:02,965 [wft4galaxy.runner] [DEBUG]  Cleanup of workflow test '72fdf059-1bee-11e8-a49a-0242ac110002'...
2018-02-27 18:46:02,965 [wft4galaxy.runner] [DEBUG]  Cleanup of workflow test '72fdf059-1bee-11e8-a49a-0242ac110002': DONE
2018-02-27 18:46:02,967 [wft4galaxy.app.runner] [DEBUG]  wft4galaxy.run_tests exiting with code: 0
2018-02-27 19:46:01,902 [wft4galaxy-docker] [DEBUG]  Docker container terminated with 0 exit code
pierrick@marcie:wft4galaxy$ echo $?
0
phnmnl / wft4galaxy

Exit status is zero when server connection fails #45
