QPID-5980: more javadoc fixups

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1616792 13f79535-47bb-0310-9956-ffa450edef68
QPID-5980: exclude selector parser from javadoc, its full of generated incomplete javadoc

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1616793 13f79535-47bb-0310-9956-ffa450edef68
QPID-5980: revert exclusion of selector parser from javadoc run, it is only emitting warnings

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1616794 13f79535-47bb-0310-9956-ffa450edef68