[Disasterrisk] Travis tests failing

[cezio]

I've updated tests so they won't fail when run locally (there was a mismatch between arguments supplied for one of command scripts in tests and in cli, also pdf generation wouldn't run in test env, because pdf gen expects running webserver; fix renders html internally and saves file to disk for pdf rendering).

I tried to run it on travis, but i get the same error for each test, which uses geoserver (for example, https://s3.amazonaws.com/archive.travis-ci.org/jobs/223267759/log.txt):

-------------------- >> begin captured logging << --------------------
django.request: ERROR: Internal Server Error: /risks/data_extraction/loc/AF/ht/EQ/at/impact/an/4/
Traceback (most recent call last):
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/django/utils/decorators.py", line 110, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/django/views/generic/base.py", line 89, in dispatch
    return handler(request, *args, **kwargs)
  File "/home/travis/build/geosolutions-it/geonode/geonode/contrib/risks/views.py", line 563, in get
    features = self.get_features(risk, dimension, dymlist, **feat_kwargs)
  File "/home/travis/build/geosolutions-it/geonode/geonode/contrib/risks/views.py", line 236, in get_features
    password=s['PASSWORD'])
  File "/home/travis/build/geosolutions-it/geonode/geonode/contrib/risks/datasource.py", line 22, in __init__
    self.wfs = GeoserverDataSource.WFCLASS(url=url, version='2.0.0', **kwargs)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/owslib/wfs.py", line 50, in WebFeatureService
    password=password)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/owslib/feature/wfs200.py", line 65, in __new__
    username=username, password=password)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/owslib/feature/wfs200.py", line 92, in __init__
    self._buildMetadata(parse_remote_metadata)
  File "/home/travis/virtualenv/python2.7.12/lib/python2.7/site-packages/owslib/feature/wfs200.py", line 104, in _buildMetadata
    featuretypeelems=featuretypelistelem.findall(nspath('FeatureType', ns=WFS_NAMESPACE))
AttributeError: 'NoneType' object has no attribute 'findall'

We're running empty geoserver in travis, so get_features call will return empty response, because there's no data in. I think we should either:

• make geoserver's mockup for tests,
• make static dataset for geoserver to be used during tests,
• update command scripts to include layers/sql views generation in geoserver, so it will be fully configured to work with risks app, and include that into tests.