flux boundary kernel call after advection and reactivate lattice_vtk testcase

Author: itischler

src/walberla_bridge/src/electrokinetics/EKinWalberlaImpl.hpp

@@ -600,6 +600,7 @@ class EKinWalberlaImpl : public EKinWalberlaBase {
                                  ". Hint: LB may be inactive.");
       }
       kernel_advection(velocity_id);
+      kernel_boundary_flux();
     }
     kernel_continuity();
 

testsuite/python/CMakeLists.txt

@@ -397,8 +397,6 @@ python_test(FILE utils.py MAX_NUM_PROC 1)
 python_test(FILE npt_thermostat.py MAX_NUM_PROC 4)
 python_test(FILE box_geometry.py MAX_NUM_PROC 1)
 python_test(FILE lattice.py MAX_NUM_PROC 4)
-# TODO walberla: remove next line after fixing performance bottleneck
-python_test(FILE lattice_vtk.py MAX_NUM_PROC 1 GPU_SLOTS 1 SUFFIX 1_core)
 python_test(FILE lattice_vtk.py MAX_NUM_PROC 4 GPU_SLOTS 1)
 if(${ESPRESSO_TEST_NP} GREATER_EQUAL 6)
   python_test(FILE lattice_vtk.py MAX_NUM_PROC 6 SUFFIX 6_cores GPU_SLOTS 1)