AMQP-360 Update Versions; Align with SI/SF 4

JIRA: https://jira.springsource.org/browse/AMQP-360

Note: The changes to the RabbitBrokerAdmin test rules are simply
to make them work with junit 4.11 - these tests (controlled by
a System property) currently do no run and will be addressed by
a separate JIRA.

RabbitBrokerAdmin is not part of the main Spring-AMQP runtime.