JDF-510: change the use of the scoped-context to avoid a TooManyChannelE...

...xception and use the Context global for this bean to prevent also from performance issues due to massive re-creation and parallel connections for several bean instances. To reflect the correct terms 'EJBClient34' is renamed to to 'ScopedContext'.

Fix for https://issues.jboss.org/browse/JDF-510