Resize props as needed during initStatefulProps (prereq for #3443)
Reiniting materials when computing aux kernels is optional (prereq for #3443)
Merge pull request #3608 from permcody/reinit_mat_exec_on_3443

Reinit mat exec on 3443
Merge commit '798f9ac44be5daa0a6d87d9c7a068ae2dea44b3d'