Allow normalizer to access related calculations
In some cases calculations dependant on each other (e.g. phonopy, elastic). In this cases the system must ensure that all calculations are processed before a dependant calculation normalization is trying to access the dependee.
One strategy to achieve this, would be to split normalization into two (or more?) phases. All calculations of one upload need to be fully processed (incl. phase 1 normalization) before the normalizers of the next phase are run.
For performance reasons the necessity of a phase 2 (or 3, ..) should be calculation (or code?) specific.