Update test data in publishing feature spec
Update test data in publishing feature spec

- use FactoryGirl instead of Payloads for test data generation
- group the scenarios by context to bring the specs and test data closer
- remove detail (eg the search payload) from the spec, as it's already covered
at the unit level

alphagov/specialist-publisher,alphagov/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher,alphagov/specialist-publisher-rebuild