Removes LightInject as Source and adds it as DLL dependencies, updates to latest Light Inject.

src/Umbraco.Tests/Cache/DistributedCache/DistributedCacheTests.cs

@@ -1,11 +1,11 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using LightInject;
 using Moq;
 using NUnit.Framework;
 using umbraco.interfaces;
 using Umbraco.Core;
-using Umbraco.Core.LightInject;
 using Umbraco.Core.Logging;
 using Umbraco.Core.ObjectResolution;
 using Umbraco.Core.Sync;