Spring Security Use SecurityContextHolderStrategy in CasAuthenticationFilter

The filter should use the SecurityContextHolderStrategy in its successfullAuthentication method instead of accessing the holder statically.

Comment From: kandaguru17

@marcusdacoregio can i work on this one? created a PR for the same :)

Comment From: marcusdacoregio

Yes @kandaguru17, it's yours

Comment From: marcusdacoregio

Closing in favor of #13418