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

Author: Doccrazy

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

@@ -58,7 +58,7 @@ public Response logout(@QueryParam(CASLoginProtocol.SERVICE_PARAM) String servic
             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;
         }