Updated openstack/openstack
Project: openstack/heat  d7d8dd76252ec7036b164e0ea09f09603b38f796
null
Fix the middleware MIME type

This is still a hangover from some code coping from glance.

Closes-bug: #1252887
Change-Id: I7e2ebe0a51fc88dff5fb17a5251bb711216f8139