update for KEYCLOAK-7166 Added the possibility of not logging out of remote idp

 src/main/java/org/keycloak/protocol/cas/endpoints/LogoutEndpoint.java

@@ -58,7 +58,7 @@
            if (redirectUri != null) userSession.setNote(CASLoginProtocol.LOGOUT_REDIRECT_URI, redirectUri);

            logger.debug("Initiating CAS browser logout");
            Response response =  AuthenticationManager.browserLogout(session, realm, authResult.getSession(), session.getContext().getUri(), clientConnection, headers);
            Response response =  AuthenticationManager.browserLogout(session, realm, authResult.getSession(), session.getContext().getUri(), clientConnection, headers, null);
            logger.debug("finishing CAS browser logout");
            return response;
        }