Edited Issue: Set MaxDataServiceVersion to 3.0 in model builder [707]

If we don't do that, client code won't work for V3 features like collection property.<br /><br />A workaround right now is to use following code:<br />var model = mb.GetEdmModel();<br />model.SetMaxDataServiceVersion(Version.Parse("3.0"));<br /><br />We should set this value to 3.0 as default. With 3.0, all 2.0 and 1.0 can still work.