🧹 Ensure feature specs run clean

Prior to this commit, we did not automatically clean the features.  The
below ripgrep (and output) shows that there were some features which did
not start from a clean state.

```
rg "(clean|clean_repo):" spec/features --files-without-match
``

```
spec/features/accounts_spec.rb
spec/features/proprietor_spec.rb
spec/features/featured_collections_spec.rb
spec/features/user_roles_spec.rb
spec/features/oai_pmh_spec.rb
```

spec/rails_helper.rb

@@ -151,7 +151,7 @@
     ActiveFedora::SolrService.reset!
     # Pass `:clean' (or hyrax's convention of :clean_repo) to destroy objects in fedora/solr and
     # start from scratch
-    if example.metadata[:clean] || example.metadata[:clean_repo]
+    if example.metadata[:clean] || example.metadata[:clean_repo] || example.metadata[:type] == :feature
       ## We don't need to do `Hyrax::SolrService.wipe!` so long as we're using `ActiveFedora.clean!`;
       ## but Valkyrie is coming so be prepared.
       # Hyrax::SolrService.wipe!