Remove Ember.Logger from application module, Ember.Test from test

[toddjordan]

Part of ember-learn/ember-api-docs#419

stuff removed from modules still documented in classes, they just aren't imported view those modules so didn't want to add confusion.

Still trying to figure out how to get rid of the odd Ember references that show up in them.

Removed some stuff from @ember/application

Removed some stuff from @ember/testing

And the newly added private @ember/map package was showing up, so I made it private.