Change Wrapper class Namespace to the namespace to file that trigge…

…r the generator

TestsHelper.SourceGenerator/MockFilling/PartialImplementation/PartialClassCreator.cs

@@ -56,7 +56,7 @@ IType testedClassType
                 var wrapperFile = FileBuilder.Create($"Wrapper.{mockDependencyBehavior.Type.Name}.generated.cs");
                 fileBuilders.Add(wrapperFile);
 
-                wrapperFile.Namespace = "TestsHelper.SourceGenerator.MockWrapping";
+                wrapperFile.Namespace = containingNamespace;
 
                 TypeBuilder dependencyWrapperType = wrapperFile.AddClass();
                 dependencyWrapperGenerator.GenerateCode(dependencyWrapperType, mockDependencyBehavior.Type);