Changing the video store to use a nested saga data and also make use of
the new convenience base class ContainSagaData
Rewerting
https://github.com/NServiceBus/NServiceBus/commit/db9fb286d82bf4f44784aef8b37c8f36f6c1e1d8
until we can fix it properly. The current fix causes multiple container
registrations which in turn causes spring to blow up