NO-JIRA: Fix typo "sock.close" in qpid/python/qpid/util.py

Added missing parentheses on call to sock.close().

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1493873 13f79535-47bb-0310-9956-ffa450edef68
QPID-4926: Get Unix sasl/ssl test working

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1493903 13f79535-47bb-0310-9956-ffa450edef68