QPID-5884 : The broker should not NPE if it receives a SASL Init request where no mechanism is provided

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1612284 13f79535-47bb-0310-9956-ffa450edef68
QPID-5884 : The client should not send SASL Init frame where no mechanism is provided

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1612291 13f79535-47bb-0310-9956-ffa450edef68
QPID-5891: Add operational logging for the cases when remote node becomes detached or attached

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1612321 13f79535-47bb-0310-9956-ffa450edef68
QPID-5909: Allow setting of BDB HA message store durability many times

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1612322 13f79535-47bb-0310-9956-ffa450edef68