Updated openstack/openstack
Project: openstack/neutron  2426726b9505d14579eecd7e51ca177f731a5851

Fix isinstance assertions

self.assertIsInstance is preferred over assert(isinstance(..)). See feedback in:
https://review.openstack.org/#/c/102754/1/neutron/tests/unit/test_extension_security_group.py

Change-Id: I9dd6141d8f25961eb42a390b45e6d94d482afc1c