Updated openstack/openstack
Project: openstack/heat  613281fc2a75de8dc7d6b2a1d210f6721154e808

Give resource fakes a string ID

Resource ID values are actually UUIDs but unit tests assume
they are typed as integers.

This change uses the same numbers for test IDs but types them
as strings, which makes the resource fakes closer to real-world
usage.

Change-Id: I8c9d6889db6451019e3986729906b5a37188c133