[make:controller] generate final controller class

[jrushlow]

Adds the ability to generate controllers with the final PHP class keyword based on MakerBundle's config preferences.

• enhances the ClassData object to handle instantiation with absolute class name values. E.g. \Foo\Bar\Controller and in turn, calling getNamespace() will not include the root_namespace e.g. Foo\Bar
• adds test assertions to compare the generated controller to a known test fixture (expected controller)
• Generator's createClassFromClassData() is able to generate regular classes and controller classes based on the $isController method argument. This will eventually replace the existing Generator::createClass() && Generator::createController() methods.