[T] Test group based param. in SteadyStateDiffusion.

ProcessLib/SteadyStateDiffusion/Tests.cmake

...ube_1x1x1_SteadyStateDiffusion/2/cube_1e4_anisotropic.prj

...ateDiffusion/2/cube_1e4_anisotropic_ts_0_t_0_000000_0.vtu

...ateDiffusion/2/cube_1e4_anisotropic_ts_0_t_0_000000_1.vtu

...ateDiffusion/2/cube_1e4_anisotropic_ts_1_t_1_000000_0.vtu

...ateDiffusion/2/cube_1e4_anisotropic_ts_1_t_1_000000_1.vtu

..._1x1x1_geometry_left_partitioned_cell_properties_cfg2.bin

..._1x1x1_geometry_left_partitioned_cell_properties_val2.bin

...usion/2/cube_1x1x1_geometry_left_partitioned_msh_cfg2.bin

...usion/2/cube_1x1x1_geometry_left_partitioned_msh_ele2.bin

...ion/2/cube_1x1x1_geometry_left_partitioned_msh_ele_g2.bin

...usion/2/cube_1x1x1_geometry_left_partitioned_msh_nod2.bin

..._1x1x1_geometry_left_partitioned_node_properties_cfg2.bin

..._1x1x1_geometry_left_partitioned_node_properties_val2.bin

...1x1x1_geometry_right_partitioned_cell_properties_cfg2.bin

...1x1x1_geometry_right_partitioned_cell_properties_val2.bin

...sion/2/cube_1x1x1_geometry_right_partitioned_msh_cfg2.bin

...sion/2/cube_1x1x1_geometry_right_partitioned_msh_ele2.bin

...on/2/cube_1x1x1_geometry_right_partitioned_msh_ele_g2.bin

...sion/2/cube_1x1x1_geometry_right_partitioned_msh_nod2.bin