Adding cleanup of floating ips

Adding floating ips to floating_ips list in test_floating_ips
and test_revisions so they can be cleaned up when
resource_cleanup is called.

Change-Id: I80b50507a69b683dae0e003c5d881f14b8201976
diff --git a/neutron/tests/tempest/api/test_revisions.py b/neutron/tests/tempest/api/test_revisions.py
index e0419d9..1da4493 100644
--- a/neutron/tests/tempest/api/test_revisions.py
+++ b/neutron/tests/tempest/api/test_revisions.py
@@ -255,6 +255,7 @@
             port_id=port['id'],
             description='d1'
         )['floatingip']
+        self.floating_ips.append(body)
         self.assertIn('revision_number', body)
         b2 = self.client.update_floatingip(body['id'], description='d2')
         self.assertGreater(b2['floatingip']['revision_number'],