Cleaned up generator tests, and fixed Haxe ImplementInterface tests to match actual output.

Author: Neverbirth

Tests/External/Plugins/ASCompletion.Tests/ASCompletion.Tests.csproj

@@ -111,6 +111,7 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>Resources.resx</DependentUpon>
     </Compile>
+    <Compile Include="TestUtils\ContextExtensions.cs" />
     <Compile Include="TestUtils\TestFile.cs" />
   </ItemGroup>
   <ItemGroup>