Updated openstack/openstack
Project: openstack/heat  0adaf22ab38baf105e4b831387c7ad675c61b6c6

Validate nova server's metadata

This prevents "foo" getting passed into the metadata.
This can happen when using get_attr() to return a dynamic value.

Change-Id: I17eab659e65a51963e510add4d71fbc90a3a3a53
Closes-bug: #1338811