trivial: Fix file permissions
trivial: Fix file permissions

No reason for this to be executable.

Change-Id: I125a5b73101fa6f1d55f4ded91d3b4192c91d87e
Signed-off-by: Stephen Finucane <492121341a95b3c3aab646bed44634f739dd019b@redhat.com>

openstack/oslo.policy