QPID-4839: HA Sporadic failure of ha_tests.test_join_ready_cluster

Bug in StatusCheck, was setting fetch timeout to uninitialized value
which was sometimes 0, causing an immediate timeout of fetch.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1482481 13f79535-47bb-0310-9956-ffa450edef68