QPID-6142: Fix NPE thrown on startup when broker fails to start due to CO validation exceptions

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1631732 13f79535-47bb-0310-9956-ffa450edef68
QPID-6151: [Java Broker Web Management Console]  Fix race condition affecting the display of preference provider attributes

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1631746 13f79535-47bb-0310-9956-ffa450edef68
QPID-6152: [Java Client] Allow connection/session close time to be overridden by system property.

Change implementation so that the timeout is applied individually to each session close, the connection and
the shutdown of the task pool.   Also moved the shutdown of the task pool to a finally, so that it occurs
even if one or more sessions fail to close.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1631810 13f79535-47bb-0310-9956-ffa450edef68
QPID-6150: Add __init__.py to setup.py for linear store.

The file was not being included in the source tarball.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1631819 13f79535-47bb-0310-9956-ffa450edef68