Replace controller extends to AbstractController

[acrobat]

The symfony Controller class is deprecated and will be replace by AbstractController. So following classes need to be updated to be compatible with symfony 5.

Possible solutions:

• Classes with no uses of $this->get() to access the container can be changed to extended from the class.
• Other (larger) controller classes that use the container should be refactored that the common logic is moved to a service and should be declared final. This way we can change the extended class without BC breaks in 6.0
  Quick fix can be the already tag them as @final so we can move on and do the refactoring in later version of 6.x
• The "special" controllers like AdminListController, AbstractXXXControllers can't be final so they will need a deprecation that accessing the container directly will not work in 6.0

Class	Status
src/Kunstmaan/AdminBundle/Controller/BaseSettingsController.php
src/Kunstmaan/AdminBundle/Controller/DefaultController.php
src/Kunstmaan/AdminBundle/Controller/ModulesController.php
src/Kunstmaan/AdminListBundle/Controller/AdminListController.php
src/Kunstmaan/AdminListBundle/Controller/EntityLockCheckController.php
src/Kunstmaan/ArticleBundle/Controller/AbstractArticleOverviewPageController.php
src/Kunstmaan/CacheBundle/Controller/VarnishController.php
src/Kunstmaan/DashboardBundle/Controller/DashboardController.php
src/Kunstmaan/DashboardBundle/Controller/GoogleAnalyticsAJAXController.php
src/Kunstmaan/DashboardBundle/Controller/GoogleAnalyticsController.php
src/Kunstmaan/FormBundle/Controller/AbstractFormPageController.php
src/Kunstmaan/FormBundle/Controller/FormSubmissionsController.php
src/Kunstmaan/LeadGenerationBundle/Controller/AbstractNewsletterController.php
src/Kunstmaan/LeadGenerationBundle/Controller/AbstractRedirectController.php
src/Kunstmaan/MediaBundle/Controller/AviaryController.php
src/Kunstmaan/MediaBundle/Controller/ChooserController.php
src/Kunstmaan/MediaBundle/Controller/FolderController.php
src/Kunstmaan/MediaBundle/Controller/IconFontController.php
src/Kunstmaan/MediaBundle/Controller/MediaController.php
src/Kunstmaan/MultiDomainBundle/Controller/SiteSwitchController.php
src/Kunstmaan/NodeBundle/Controller/NodeAdminController.php
src/Kunstmaan/NodeBundle/Controller/SlugController.php
src/Kunstmaan/NodeBundle/Controller/WidgetsController.php
src/Kunstmaan/NodeSearchBundle/Controller/AbstractSearchPageController.php
src/Kunstmaan/PagePartBundle/Controller/PagePartAdminController.php
src/Kunstmaan/SeoBundle/Controller/RobotsController.php
src/Kunstmaan/SitemapBundle/Controller/SitemapController.php
src/Kunstmaan/TranslatorBundle/Controller/TranslatorCommandController.php
src/Kunstmaan/VotingBundle/Controller/VotingController.php