Consider: AuxCalphadElasticity references different precipitate eigenstrain

[amjokisaari]

AuxCalphadElasticity references the precipitate eigenstrain*relaxation factor (from the material property). May want to unlink the nucleation eigenstrain used from the precipitated eigenstrain (that has a relaxation factor).

[amjokisaari]

Actually, this should be: create a new material for the nucleus information! Then all pertinent objects can reference that across the board.