Issue #2512866 by lauriii, Berdir, Wim Leers, Fabianx, effulgentsia, catch,...

Issue #2512866 by lauriii, Berdir, Wim Leers, Fabianx, effulgentsia, catch, dawehner: CacheContextsManager::optimizeTokens() optimizes ['user', 'user.permissions'] to ['user'] without adding cache tags to invalidate that when the user's roles are modified