Added tests for DB Converters

Closes #482

src/Marr.Data/Reflection/SimpleReflectionStrategy.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 using System.Reflection;
@@ -19,6 +19,7 @@ namespace Marr.Data.Reflection
             var key = entityType.FullName + name;
             if (!MemberCache.TryGetValue(key, out member))
             {
+                var test = entityType.GetMembers();
                 member = entityType.GetMember(name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)[0];
                 MemberCache[key] = member;
             }