NuCivic/nucivic-internal#204 Creating taxonomies on setup test.

NuCivic/nucivic-internal#204

### Acceptance tests
- [ ] git pull
- [ ] drush en dkan_default_content
- [ ] drush en dkan_dataset
- [ ] drush test-run --xml 'DKAN Dataset' --uri=http://dkan/
- [ ] Then it should pass all the tests