[T] Relax tolerances for sigma.

These tests are failing on testing machines.

Tests/Data/Mechanics/EhlersDamageNonLocal/bar/p1/bar.prj

@@ -292,7 +292,7 @@
         <vtkdiff>
             <file>out_bar_coarse_ED_pcs_0_ts_30_t_0.300000.vtu</file>
             <field>sigma</field>
-            <absolute_tolerance>5e-8</absolute_tolerance>
+            <absolute_tolerance>6e-8</absolute_tolerance>
             <relative_tolerance>0</relative_tolerance>
         </vtkdiff>
         <vtkdiff>

Tests/Data/Mechanics/EhlersDamageNonLocal/bar/p3/bar.prj

@@ -316,7 +316,7 @@
         <vtkdiff>
             <file>out_bar_coarse_ED_pcs_0_ts_60_t_0.600000.vtu</file>
             <field>sigma</field>
-            <absolute_tolerance>1e-7</absolute_tolerance>
+            <absolute_tolerance>2e-7</absolute_tolerance>
             <relative_tolerance>0</relative_tolerance>
         </vtkdiff>
         <vtkdiff>

Tests/Data/Mechanics/EhlersDamageNonLocal/beam/medium/beam.prj

@@ -343,7 +343,7 @@
         <vtkdiff>
             <file>out_beam_medium_ED_pcs_0_ts_80_t_0.800000.vtu</file>
             <field>sigma</field>
-            <absolute_tolerance>6e-7</absolute_tolerance>
+            <absolute_tolerance>8e-7</absolute_tolerance>
             <relative_tolerance>0</relative_tolerance>
         </vtkdiff>
         <vtkdiff>