Fixup when implicit top drag is used

Author: cbegeman

compass/ocean/tests/isomip_plus/namelist.forward_and_ssh_adjust

@@ -22,6 +22,7 @@ config_land_ice_flux_explicit_topDragCoeff = 2.5e-3
 config_land_ice_flux_tidal_Jourdain_U0 = 1e-2
 config_land_ice_flux_jenkins_heat_transfer_coefficient = 0.0194
 config_land_ice_flux_jenkins_salt_transfer_coefficient = 0.00055428571
+config_use_implicit_top_drag = .true.
 config_implicit_constant_bottom_drag_coeff = 2.5e-3
 config_eos_type = 'linear'
 config_eos_linear_alpha = 0.03836

compass/ocean/tests/isomip_plus/namelist.single_layer.forward_and_ssh_adjust

@@ -1,5 +1,6 @@
 config_time_integrator='RK4'
 config_dt='00:00:10'
+config_use_implicit_top_drag = .false.
 config_bottom_drag_mode = 'explicit'
 config_explicit_bottom_drag_coeff = 3.0e-3
 config_disable_thick_vadv = .true.

compass/ocean/tests/isomip_plus/namelist.thin_film.forward_and_ssh_adjust

@@ -11,4 +11,3 @@ config_zero_drying_velocity_ramp_hmax=1e-1
 config_use_ssh_gradient_wetting_drying=.false.
 config_prevent_drying=.true.
 config_zero_drying_velocity = .true.
-config_use_implicit_top_drag = .true.