This commit patches a few acceptance tests in order to get them to
pass under OpenStack Mitaka.
The devstack dev environment script has also been updated to reflect
OpenStack Mitaka as well as the new Terraform dependency vendoring.
This commit adds the openstack_lb_member_v1 resource. This resource models a
load balancing member which was previously coupled to the openstack_lb_pool_v1
resource.
By creating an actual member resource, load balancing members can now be
dynamically managed through terraform.
