Added accessor method getView() to ViewVarsTrait.
Remove turning off auto rendering when action is called through requestAction().

You should return a response instance from the action to avoid auto rendering.
Refactor ViewVarsTrait::getView().
Add View::initialize().
Use loadHelper() instead of manipulating $helpers array in test.
Fix incorrect variable name.
Use instanceof instead of is_a().
Merge pull request #4005 from ADmad/3.0-view-accessor

3.0 - WIP - Added accessor method getView() to ViewVarsTrait.