Updated openstack/openstack
Project: openstack/tempest  ceef6626c7da8a9e57d1bc0a8118c67212bc3c79

Avoid conflicts with other tests instances

Avoid conflicts with other instances that exist, for example when
weren't deleted in other tests. Just filter out them in test that
check instances amount by server IDs

Closes-Bug: #1340382
Change-Id: I51494c9f47745810583f682caadcd8772805733a