[tests] fix server import

When importing server, couch_state will load itself against couch_db url
configured on server. This fails when running on Docker as couchdb is in
another node.

server/src/leap/soledad/server/__init__.py

@@ -272,12 +272,14 @@ def _get_couch_state():
     SoledadBackend.BATCH_SUPPORT = conf.get('batching', False)
     return state
 
-
+try:
     _couch_state = _get_couch_state()
-
     # a WSGI application that may be used by `twistd -web`
     application = GzipMiddleware(
         SoledadTokenAuthMiddleware(SoledadApp(_couch_state)))
+except:
+    pass
+
 
 # another WSGI application in which we bypass token auth middleware for ease of
 # mind while debugging in your local environment