Adds cookbook repositories for DB and MQ support

Chef "wrapper cookbooks" provide support for setting up
database and message queue stuff, keeping the setup of
those things out of the OpenStack project cookbooks.

This patch adds the DB and MQ wrapper cookbooks, bringing
in Matt Ray's upstream repo locations as initial commits.

Change-Id: I8aff3e918fbf883ce5f1f3336078e3b42d3de288
Reviewed-on: https://review.openstack.org/29580
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins