[T] Update GWF tests.

ProcessLib/GroundwaterFlow/Tests.cmake

...e_1x1x1_GroundWaterFlow/cube_1e3_calculatesurfaceflux.prj

...GroundWaterFlow/cube_1e3_neumann_calculatesurfaceflux.prj

...c/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_front.vtu

...ic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_left.vtu

...c/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_right.vtu

.../cube_1x1x1_GroundWaterFlow/cube_1x1x1_prism_2e3_back.vtu

...ube_1x1x1_GroundWaterFlow/cube_1x1x1_prism_2e3_bottom.vtu

...cube_1x1x1_GroundWaterFlow/cube_1x1x1_prism_2e3_front.vtu

.../cube_1x1x1_GroundWaterFlow/cube_1x1x1_prism_2e3_left.vtu

...cube_1x1x1_GroundWaterFlow/cube_1x1x1_prism_2e3_right.vtu

...c/cube_1x1x1_GroundWaterFlow/cube_1x1x1_prism_2e3_top.vtu

...GroundWaterFlow/cube_2e3_prism_surfaceflux_front_back.prj

...GroundWaterFlow/cube_2e3_prism_surfaceflux_left_right.prj

...GroundWaterFlow/cube_2e3_prism_surfaceflux_top_bottom.prj

..._GroundWaterFlow/wedge_1e3_prism_surfaceflux_diagonal.prj

...ge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_bottom.vtu

...wedge_1x1x1_1e3_prism_diagonal-left-front--right-back.vtu

...WaterFlow/wedge_1x1x1_1e3_prism_left-front-top-bottom.vtu