When updating L2 cached object, make sure that any versioned field is also updated

[andyjefferson]

In an L2 cached object we store the "version" separately. In the case of a versioned field (as opposed to surrogate version) we don't currently enforce that this field is also updated in the L2 cache. There many be situations where the version is updated for optimistic check purposes, but the field is not marked as dirty. Consequently the L2 cached object doesnt get the field updated