minor #2098 Update ControllerListener.php for performance (Arthur-min)
minor #2098 Update ControllerListener.php for performance (Arthur-min)

This PR was squashed before being merged into the 2.0.x-dev branch (closes #2098).

Discussion
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Update ControllerListener.php for performance

Performance improvement

Commits
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3aaf8b5e Update ControllerListener.php for performance

javiereguiluz/EasyAdminBundle,OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,yceruto/EasyAdminBundle,yceruto/EasyAdminBundle,yceruto/EasyAdminBundle,javiereguiluz/EasyAdminBundle,OskarStark/EasyAdminBundle