Added missing file with shadowed declaration tests

Author: rkapka

RubberduckTests/RubberduckTests.csproj

@@ -113,6 +113,7 @@
     <Compile Include="Inspections\HungarianNotationInspectionTests.cs" />
     <Compile Include="Inspections\ImplicitActiveWorkbookReferenceInspectionTests.cs" />
     <Compile Include="Inspections\MemberNotOnInterfaceInspectionTests.cs" />
+    <Compile Include="Inspections\ShadowedDeclarationInspectionTests.cs" />
     <Compile Include="Inspections\StopKeywordInspectionTests.cs" />
     <Compile Include="Inspections\OptionBaseZeroInspectionTests.cs" />
     <Compile Include="QuickFixes\AssignedByValParameterMakeLocalCopyQuickFixTests.cs" />