Updated openstack/openstack
Project: openstack-infra/devstack-gate  9bb37850ca7f86b9bdf512b082a01ecece7fb70b
null
don't use ec2 devstack exercises for validation

we have tempest for this, and boto isn't that stable of a library.
fixes the current gate wedge.

Change-Id: Ie1ff921f51c0d2bc6283a31a09ebfdfc7d573d0f