Update n_elem/n_nodes caches more frequently
Update n_elem/n_nodes caches more frequently

This seems to fix the regression with Gmsh->ParallelMesh reads

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