Updated openstack/openstack
Project: openstack-dev/devstack  1827b48766de1e758a096d0bf04aaf8d53235816

Only sysctl reserverd ports when available.

Only set the keystone reserved ports when available, on some system
(like when running under containers) where this sysfs interface is not
exposed we are almost pretty sure these ports would be exclusive for our
devstack.

Change-Id: I06d7d227ae94d564c91c16119e4bbbcc6564a280