[#430] Add test for packages in vocab list.

From seanh commit 4c917f58e544d42c101964077a684db27caf293a
PEP8
[#430] Fix for packages not appearing in vocabulary_show
Merge remote-tracking branch 'origin/master' into 430-packages-missing-vocabulary-show
Merge branch 'master' of github.com:okfn/ckan into 430-packages-missing-vocabulary-show
Merge branch '430-packages-missing-vocabulary-show'