Add freezer as a new project to stackforge

This patch adds the config needed to create and maintain freezer
in Stackforge.

Freezer is an incremental backup and restore automation
tool for file system, MongoDB, MySQL.
LVM snapshot and strong encryption are supported and
data is stored in OpenStack Swift.

See also:
 * https://pypi.python.org/pypi/freezer

Change-Id: Ib05a1f11577ba54ccc2c388c15057d6a5ee3199f
Merge "Add freezer as a new project to stackforge"