Updated openstack/openstack
Project: openstack/horizon  d4b19aec7ad17b0aad6a4e4fe1c0e9eefc69e2a0

"Device size" field only allow positive values

Changed min value to 1

Change-Id: I00e4b9682e8b3fd0d3677feddd41fc55f22eacf6
Closes-Bug: 1357335