Move VH flux to left side and group with q.
Move VH flux to left side and group with q.

Moving it over does not affect BEULER, BDF, THETA.  (And ...IMEX routines all
currently fail anyway.)

Also, use DM{Get|Restore}LocalVector() instead of DMCreateLocalVector() and
VecDestroy().

bueler/p4pdes,bueler/p4pdes,bueler/p4pdes,bueler/p4pdes