Server stopping at RemoteEJBClientStatefulBeanFailoverTestCase needs to be guarded with timeout otherwise the server stop may stuck further test processing

The clustering test RemoteEJBClientStatefulBeanFailoverTestCase/RemoteEJBClientStatefulFailoverTestBase works with stopping WildFly server to check how clustering and balancing of ejb client works.

The call of the management operation stop is not guarded with timeout option currently.

That could make a trouble (and at Narayana CI) of long standing stopping server which is waiting to be stopped.

The stop operation should be guarded with timeout option to not being infinite.