Add test cases for scala handler dot notation with classes

[comp615]

Passing in a class as a value for the context works when you use standard notation: {{#classValue}} {{classMember}} {{/classValue}}

However, it throws a notFound/guard error when referenced directly: {{classValue.classMember}}

This added two tests to illustrate the differences, with the dot notation one failing

[spullara]

It looks like because the ScalaObjectHandler wraps Maps I have an issue in the dot notation. Digging into it to see how it can be fixed.

[spullara]

I'm tracking this as an issue: https://github.com/spullara/mustache.java/issues/189