force disable validation on tests

Author: mauroservienti

src/Radical.Windows.Tests/Presentation/AbstractMementoViewModelTests.cs

@@ -266,7 +266,7 @@ public void AbstractMementoViewModel_PropertyChanged_is_raised_GetErrors_should_
             };
 
             sut.ValidateUsing(
-                new DataAnnotationValidationService<SampleTestMementoViewModel>(sut));
+                new DataAnnotationValidationService<SampleTestMementoViewModel>(sut), false);
             sut.NotNullNotEmpty = "";
 
             Assert.IsNotNull(errors);

src/Radical.Windows.Tests/Presentation/AbstractViewModelTests.cs

@@ -200,7 +200,7 @@ public void AbstractViewModel_PropertyChanged_is_raised_GetErrors_should_contain
             };
 
             sut.ValidateUsing(
-                new DataAnnotationValidationService<SampleTestViewModel>(sut));
+                new DataAnnotationValidationService<SampleTestViewModel>(sut), false);
             sut.NotNullNotEmpty = "";
 
             Assert.IsNotNull(errors);