Remove dynamic property creation from controllers.

Gabriel Carleton-Barnesrequested to merge
controller_cleanup into 2.x

Prevents this errors like this one from appearing on newer versions of PHP: Deprecated: Creation of dynamic property Drupal\redhen_connection\Controller\RedhenConnections::storage is deprecated in /code/web/modules/contrib/redhen/modules/redhen_connection/src/Controller/RedhenConnections.php on line 26 Deprecated: Creation of dynamic property Drupal\redhen_connection\Controller\RedhenConnections::typeStorage is deprecated in /code/web/modules/contrib/redhen/modules/redhen_connection/src/Controller/RedhenConnections.php on line 27

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