QPID-5248: fix regression caused by previous commit on this issue

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1535731 13f79535-47bb-0310-9956-ffa450edef68
QPID-5248: close gap in tests by explicit adding receiver close

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1535732 13f79535-47bb-0310-9956-ffa450edef68