Access configuration attributes through JMX

This might be more appropriate split into a number of tasks but for the moment I am raising it as a single issue.

There are a number of properties that can be set on message driven beans using activation config properties e.g. 'maxPoolSize'. After deployment there is not a mechanism to check that the correct properties have been applied. It would be good to be able to inspect the configuration values using JMX.

Using the @PoolClass annotation it is possible to configure the pool that is used for the EJB, it would also be good if this configuration information could also be made available using JMX.

For the configuration items it would also be good if the attributes could be updated using JMX.

Finally providing status information such as current pool sizes through JMX would also help users check the configuration they have selected is appropriate.