I'm getting the following error when running the tests:

```
1) Content Content permissions verify public content permissions:
     TypeError: Cannot read property 'alias' of undefined
      at _produceContentSearchDocument (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/oae-content/lib/search.js:174:38)
      at _produceContentSearchDocuments (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/oae-content/lib/search.js:150:27)
      at Array.forEach (native)
      at Function._.each._.forEach (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/underscore/underscore.js:78:11)
      at _produceContentSearchDocuments (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/oae-content/lib/search.js:145:11)
      at module.exports.getMultipleContentItems (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/oae-content/lib/internal/dao.content.js:77:13)
      at executeQuery (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/oae-util/lib/cassandra.js:725:9)
      at onReturn (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/helenus/lib/connection.js:444:7)
      at onReturn (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/helenus/lib/connection.js:379:7)
      at exports.Connection.connection.addListener.self.transport.receiver.client._reqs.(anonymous function) (/Users/nicolaas/Desktop/SakaiOAE/ui/newOAE/Hilary/node_modules/helenus/node_modules/helenus-thrift/lib/thrift/connection.js:80:11)
```