Adding possibility to change type of object store to JDBC one under the Transaction subsytem

Web console currently contains item "Use HornetQ Store?" under tab Common.
This allows user change the object store which will be used for saving information about on-fly transactions.

The EAP 6.2.0 comes with new type of object store - JDBC object store. I suppose that adding such configuration option would be logical step.

The JDBC object store needs to be referenced to existing datasource and its settings have following limitations:

• it has to be standard datasource (not the xa one)
• the datasource has to be set as jta=false (otherwise the server even fails to start)
• the server has to be restarted for the jdbc object store would be activated (reload is not enough)
• when JDBC object store is set then hornetq object store has to be deactivated. Maybe there could be better to have radio buttons with file system/hornetq/jdbc object stores. But this is just an idea.