Add Puppet module timezone

The module timezone is needed to make the timezone configurable
in Packstack.

The module is available at https://github.com/saz/puppet-timezone.

This module update commit was generated by Bade.
For more info please check https://github.com/paramite/bade

This commit is setting modules to following state:
timezone
 - initial commit: e82cd1b32f395217056df492e5a7dac8dc5c683a