PROTON-519: Updated Perl modules to provide missing packages.

Incorporated patch from Robin Lee, plus added a similar change to
qpid_proton.pm as well.

Contributed by: Robin Lee <cheeselee@fedoraproject.org>

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1569022 13f79535-47bb-0310-9956-ffa450edef68