Updated openstack/openstack
Project: openstack/heat  db78c1f0ba0e546f048488d623f5059089ab5c8e

Convert unicode to six in heat/engine/resources

This patch converts unicode to six.text_type in
heat/engine/resources for python 3.x compatibility.

Change-Id: I967e70b9e9fa017479461b7f1c2baf7c2870c70c