Moving database definition models, so they are shared and can be used in the sql syntax provider.

src/Umbraco.Core/Persistence/DatabaseModelDefinitions/IndexColumnDefinition.cs

@@ -0,0 +1,8 @@
+namespace Umbraco.Core.Persistence.DatabaseModelDefinitions
+{
+    public class IndexColumnDefinition
+    {
+        public virtual string Name { get; set; }
+        public virtual Direction Direction { get; set; }
+    }
+}