Add CONFIG_KEYSTONE_REGION option.

This changeset makes packstack to support region name other than
'RegionOne'.

Change-Id: Ib304c4c0a500d0f11dd9033eafa43251b604cdf1

packstack/puppet/templates/keystone_swift.pp

@@ -1,4 +1,5 @@
 class { 'swift::keystone::auth':
   public_address  => '%(CONFIG_CONTROLLER_HOST)s',
+  region => '%(CONFIG_KEYSTONE_REGION)s',
   password => '%(CONFIG_SWIFT_KS_PW)s',
 }