https://issues.apache.org/jira/browse/AMQ-5484

Ensure that the subscriptionByConsumerId map gets cleaned up when a
sender is closed.
Adds a test used for checking memory usage in the AMQP connector, test
is disabled and not intended for normal test runs.
https://issues.apache.org/jira/browse/AMQ-5476 - ZeroPrefetchConsumerTest regression - fix default in connection factory and refactor prefetchExtension support -  https://issues.apache.org/activemq/browse/AMQ-2560
fix failing DbRestartJDBCQueueTest
reduce test duration to match existing fork timeouts
Upgrade to latest Camel release
fix intermittent failure of LeaseDatabaseLockerTest and fix log messge with lease expiry time
Merge remote-tracking branch 'upstream/trunk' into trunk