allow congress to run with no datasources

[Aaron Rosen]

2014-11-21 11:12:17.696 21825 INFO congress.dse.deepsix [-] engine:: subscribed to api-rule with dataindex policy-update
2014-11-21 11:12:17.696 21825 INFO congress.dse.deepsix [-] engine:: sending SUB msg <to:api-rule, from:engine, corrId:48bb044c-3e38-4532-9c31-7fa284132c6a, type:sub, dataindex:policy-update, body:{}>
2014-11-21 11:12:17.696 21825 DEBUG congress.service [-] 'NoneType' object has no attribute 'service_object' wrapper /home/nicira/congress/congress/service.py:34
2014-11-21 11:12:17.696 21825 TRACE congress.service Traceback (most recent call last):
2014-11-21 11:12:17.696 21825 TRACE congress.service File "/home/nicira/congress/congress/service.py", line 32, in wrapper
2014-11-21 11:12:17.696 21825 TRACE congress.service return f(*args, **kw)
2014-11-21 11:12:17.696 21825 TRACE congress.service File "/home/nicira/congress/congress/service.py", line 59, in congress_app_factory
2014-11-21 11:12:17.696 21825 TRACE congress.service congress_server.initialize_resources(api_resource_mgr, cage)
2014-11-21 11:12:17.696 21825 TRACE congress.service File "/home/nicira/congress/congress/server/congress_server.py", line 131, in initialize_resources
2014-11-21 11:12:17.696 21825 TRACE congress.service policies = cage.service_object('api-policy')
2014-11-21 11:12:17.696 21825 TRACE congress.service AttributeError: 'NoneType' object has no attribute 'service_object'
2014-11-21 11:12:17.696 21825 TRACE congress.service
2014-11-21 11:12:17.697 21825 CRITICAL congress.service [-] 'NoneType' object has no attribute 'service_object'

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/136462
Committed: https://git.openstack.org/cgit/stackforge/congress/commit/?id=6b81799a1d9f64ec52ffe07151e1897cc0126162
Submitter: Jenkins
Branch: master

commit 6b81799a1d9f64ec52ffe07151e1897cc0126162
Author: Aaron Rosen <email address hidden>
Date: Fri Nov 21 11:01:16 2014 -0800

    Allow congress to run with no datasources

    Previously congress would no return cage so congress-server would
    fail to start. Now it does.

    Change-Id: I8ff7d7c4aee5196a11e97935e8b07669ad00834c
    Closes-bug: 1395119