[swift] Updated swift module to latest stable/havana

This will allow packstack to use allow_versions
fixes: rhbz#967308

Signed-off-by: Francesco Vollero <fvollero@redhat.com>
(cherry picked from commit 6386d543bc14093c4474caf53739599ee98c42e7)
Merge pull request #2 from razorinc/havana

[swift] Updated swift module to latest stable/havana