set the VREP control as current control when applying VREP control

for the first time

Not sure it is always the better things to do here, while it can help
the consistence of the two current controls in the well_controls and
well_state.

opm/core/wells/WellsGroup.cpp

@@ -1223,6 +1223,7 @@ namespace Opm
             group_control_index_ = well_controls_get_num(wells_->ctrls[self_index_]) - 1;
             // it should only apply for nodes with GRUP injeciton control
             individual_control_ = false;
+            set_current_control(self_index_, group_control_index_, wells_);
         } else {
             well_controls_iset_type(wells_->ctrls[self_index_] , group_control_index_ , RESERVOIR_RATE);
             well_controls_iset_target(wells_->ctrls[self_index_] , group_control_index_ , ntarget);