Merge "Python 3: do not use itertools.izip"

diff --cc neutron/tests/unit/extensions/test_external_net.py
index d44f0846b03cdda5c590df1ce0883a3819492871,bd4d5730230c8cf0ac29bff4c1663811cc5abe6c..8e887973b823b0c9416c7dd0b656de6959ef4885
--- 1/neutron/tests/unit/extensions/test_external_net.py
--- 2/neutron/tests/unit/extensions/test_external_net.py
+++ b/neutron/tests/unit/extensions/test_external_net.py
@@@ -13,11 -13,8 +13,9 @@@
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
- import itertools
- 
  import mock
  from oslo_log import log as logging
 +from oslo_utils import uuidutils
  import testtools
  from webob import exc