QPID-4555: HA Test bugs causing sporadic faiulres in ha_tests.ReplicationTests.test_auto_delete_timeout

The tests were not waiting for the cluster to be ready before starting.
Updated HaCluster to wait by default before returning.

Increase timeout in calls to wait_no_queue, the default timeout of 1 sec was the same
as the auto-delete timeout.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1441157 13f79535-47bb-0310-9956-ffa450edef68