Removing usage of IProfile on DataTypeDefinition.

Giving the Code First POC an extra kick in the conventions, so the default PropertyType convention can be overridden.
If a Definition doesn't exist for the selected DataType one will be created - with backing unit test.

src/Umbraco.Tests/CodeFirst/CodeFirstTests.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Reflection;
 using NUnit.Framework;
 using Umbraco.Core;
 using Umbraco.Core.Configuration;
@@ -9,6 +10,7 @@ using Umbraco.Core.IO;
 using Umbraco.Core.Models;
 using Umbraco.Core.ObjectResolution;
 using Umbraco.Core.Serialization;
+using Umbraco.Tests.CodeFirst.Attributes;
 using Umbraco.Tests.CodeFirst.Definitions;
 using Umbraco.Tests.CodeFirst.TestModels;
 using Umbraco.Tests.TestHelpers;
@@ -45,6 +47,21 @@ namespace Umbraco.Tests.CodeFirst
             SerializationService = new SerializationService(serviceStackSerializer);
         }
 
+        [Test]
+        public void Can_Create_Model_With_NonExisting_DataTypeDefinition()
+        {
+            ContentTypeDefinitionFactory.ClearContentTypeCache();
+
+            var modelType = typeof(ModelWithNewDataType);
+            var contentType = ContentTypeDefinitionFactory.GetContentTypeDefinition(modelType);
+
+            var mappedContentTypes = ContentTypeDefinitionFactory.RetrieveMappedContentTypes();
+            ServiceContext.ContentTypeService.Save(mappedContentTypes);
+
+            var model = ServiceContext.ContentTypeService.GetContentType(1046);
+            Assert.That(model, Is.Not.Null);
+        }
+
         [Test]
         public void Can_Resolve_ContentType_From_Decorated_Home_Model()
         {