Added swift store credentials to openstackwatch.

Openstackwatch is configured to store feed data in a swift object store.
This patch adds credentials to access that swift store.

Change-Id: I61d9032150ae40fb7d207b5861cf0cf448f6feda
Reviewed-on: https://review.openstack.org/24784
Reviewed-by: Elizabeth Krumbach <lyz@princessleia.com>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins