Ensure that related links are simplified properly.
Manual port of cassandra.enabled property for production fix while
Cassandra is unstable. Committed by Tom masquerading as Adam.
You Tube adapter
Yout Tube Cannonicaliser Test

Fixed the You Tube cannonicaliser test, afte aplying a patch
Added Cassandra Enable property

This property allows enabling / disabling cassandra usage.
You Tube Adapter patch fix

Added the You Tube adapter to the correct module and resolved problems created
by the removal of the Custom Deserializer for Joda DateTimes
Merge branch 'mbst-4533-you-tube-adapter-squashed' of ssh://github.com/atlasapi/atlas into mbst-4533-you-tube-adapter-squashed