Fixing OSX test

...olver<double>_lid_driven_cavity_3d_p1_grid_0_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p2_grid_0_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p2_grid_1_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p3_grid_0_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p3_grid_1_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p3_grid_2_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p1_grid_0_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p2_grid_0_test_osx.vtk

...olver<double>_lid_driven_cavity_3d_p3_grid_2_test_osx.vtk

...k_solver<double>_lid_driven_cavity_p2_grid_0_test_osx.vtk

...k_solver<double>_lid_driven_cavity_p3_grid_0_test_osx.vtk

..._solver<double>_lid_driven_cavity_p3_grid_1__test_osx.vtk

..._solver<double>_lid_driven_cavity_p3_grid_2__test_osx.vtk