[test.burgers...dg] specify fixed dt and update expectations

dune/gdt/test/burgers/burgers__1d__explicit__dg_p1.mini

@@ -4,11 +4,12 @@ __name = Burgers1dExplicitDgP1Test
 visualization_steps                      = 0
 num_refinements                          = 1
 num_additional_refinements_for_reference = 1
+use_fixed_dt                             = 0.010413909912109373
 
 [Burgers1dExplicitDgP1Test.periodic_boundaries__numerical_engquist_osher_flux.results]
 target.h                        = [6.25e-02 3.12e-02]
-norm.L_infty_L_2                = [7.47e-02 6.21e-02]
+norm.L_infty_L_2                = [5.88e-02 4.21e-02]
 quantity.rel_mass_conserv_error = [0.00e+00 0.00e+00]
-quantity.num_timesteps          = [5.00e+01 9.90e+01]
-quantity.CFL                    = [4.82e-01 5.09e-01]
+quantity.num_timesteps          = [9.90e+01 9.90e+01]
+quantity.CFL                    = [2.35e-01 5.09e-01]
 

dune/gdt/test/burgers/burgers__1d__explicit__dg_p2.mini

@@ -4,11 +4,12 @@ __name = Burgers1dExplicitDgP2Test
 visualization_steps                      = 0
 num_refinements                          = 1
 num_additional_refinements_for_reference = 1
+use_fixed_dt                             = 0.003975344848632812
 
 [Burgers1dExplicitDgP2Test.periodic_boundaries__numerical_engquist_osher_flux.results]
 target.h                        = [6.25e-02 3.12e-02]
-norm.L_infty_L_2                = [7.41e-02 6.14e-02]
+norm.L_infty_L_2                = [5.56e-02 4.37e-02]
 quantity.rel_mass_conserv_error = [0.00e+00 0.00e+00]
-quantity.num_timesteps          = [1.32e+02 2.57e+02]
-quantity.CFL                    = [1.94e-01 1.98e-01]
+quantity.num_timesteps          = [2.57e+02 2.57e+02]
+quantity.CFL                    = [9.90e-02 1.98e-01]
 

dune/gdt/test/burgers/burgers__1d__explicit__dg_p3.mini

@@ -4,11 +4,12 @@ __name = Burgers1dExplicitDgP3Test
 visualization_steps                      = 0
 num_refinements                          = 1
 num_additional_refinements_for_reference = 1
+use_fixed_dt                             = 0.0016714981079101561
 
 [Burgers1dExplicitDgP3Test.periodic_boundaries__numerical_engquist_osher_flux.results]
 target.h                        = [6.25e-02 3.12e-02]
-norm.L_infty_L_2                = [7.72e-02 6.07e-02]
-quantity.rel_mass_conserv_error = [5.91e-15 1.02e-14]
-quantity.num_timesteps          = [2.92e+02 6.07e+02]
-quantity.CFL                    = [8.70e-02 8.32e-02]
+norm.L_infty_L_2                = [5.14e-02 4.13e-02]
+quantity.rel_mass_conserv_error = [5.17e-15 1.02e-14]
+quantity.num_timesteps          = [6.07e+02 6.07e+02]
+quantity.CFL                    = [4.17e-02 8.32e-02]