[Developers] Proposed change in the ADMConstraints schedule

[Baiotti Luca]

Erik Schnetter wrote:
> One difference is that the past time levels of the constraints would not 
> be initialised any more, which would lead to problems on the refinement 
> boundaries.
> 
> If you try this locally, do the test suites still pass?

Yes, they pass. Actually they do not pass without this change in 
ADMConstraints, because now some Whisky variables (used in 
ADMConstraints) are computed at POSTPOSTINITIAL.

Would it be a solution to schedule ADMConstraints both at POSTINITIAL 
and at POSTPOSTINITIAL?

Luca