Updated openstack/openstack
Project: openstack-dev/devstack  4710282ef6175e3b4c3c17e0e00e56b91528e94f

Set permissions on sahara cache

Signing certificate directory should have 700 mode.
Before the change it was created with 755.

As a visual impact this CR removes warning from 
keystonemiddleware.

Change-Id: I8483e73447348b9a9e33dfd382543978a70a9d43
Closes-Bug: #1387416