Fix getAttribute&getMethod to work under inheritance, tests too

[sartak]

hasMethod and hasAttribute both check whether the method/attribute
exists in the inheritance hierarchy, so we need the local check
here instead. Otherwise when you inherit "foo" then you get an error
on methods("foo").

[stevan]

Shawn,

I suspect that Cory's previous patch to yours actually fixed the behavior, but I would like to still keep your test, can you resubmit this?

• Stevan

[stevan]

Shawn, actually I just grabbed your test and added it in (with some minor changes based on Cory's last refactoring).

https://github.com/stevan/moe/commit/015790e010fa48d44a65114d6686b5150282156d