Removing Object::dispatchMethod, previously used by collections.
Removing unused Object::_set().
Removing no-op constructor
Removing Object class.
Resetting Log to avoid sending stuff to stdout and stderr when running the tests.
Adding _stop() back to classes that used to extend Cake\Core\Object.
Adding LogTrait back to classes that used to extend Cake\Core\Object.
Merge pull request #3335 from renan/3.0-object

3.0 Drop Object class