Implements U4-943 to the extent its currently possible.

Refactoring publishing methods in the ContentService.
Adding tests for the QueryBuilder.

src/Umbraco.Tests/TestHelpers/BaseUsingSqlCeSyntax.cs

@@ -0,0 +1,20 @@
+using NUnit.Framework;
+using Umbraco.Core.Persistence.SqlSyntax;
+
+namespace Umbraco.Tests.TestHelpers
+{
+    [TestFixture]
+    public abstract class BaseUsingSqlCeSyntax
+    {
+        [SetUp]
+        public virtual void Initialize()
+        {
+            SyntaxConfig.SqlSyntaxProvider = SqlCeSyntaxProvider.Instance;
+
+            SetUp();
+        }
+
+        public virtual void SetUp()
+        {}
+    }
+}