Update the default persistence adapter from journaledJDBC to amqPersistenceAdapter

ActiveMQ 5.x introduced a new high performance persistence adapter (AMQ Message Store).

In my tests here I am seeing a decent performance boost for a relatively easy configuration change:

JournaledJDBC:

[java] Overall time: 137701 ms
[java] Messages per sec: 7.262111386264443
[java]
[java] Time: 139.603
[java]
[java] OK (1 test)

AMQ Message Store:

[java] Overall time: 20511 ms
[java] Messages per sec: 48.75432694651651
[java]
[java] Time: 23.556
[java]
[java] OK (1 test)

I think it would be worthwhile making the default persistence adapter the amqPersistenceAdapter vs the current journaledJDBC.

I've attached a patch, but note it requires an ActiveMQ upgrade from 4.1.1 to 5.1.0. and as the namespaces have changed in ActiveMQ 5.1 I had to update the ra namespace in jndi.xml also.