Postpone automatic NonlinearSolver initialization
Postpone automatic NonlinearSolver initialization

This should increase backwards compatibility of the petsc_names
changes, and in particular should hopefully fix more of the MOOSE
regressions.

Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh,Mbewu/libmesh