config_disable_vel_coriolis does not disable coriolis

[mark-petersen]

The flag config_disable_vel_coriolis disables coriolis for RK4. For split explicit, coriolis is wrapped up in q(h uPerp) where q = (vorticity + f)/h is the potential vorticity. That is calculated in diagnostics, and config_disable_vel_coriolis does not appear there.

It would be safer to have config_disable_vel_coriolis simply set fCell=0, fEdge=0 and fVertex=0 on init. That could be done in the routine ocn_vel_coriolis_init.