tempest vlan test failed

[Itsuro Oda]

When tempest test is run as:
"tox -e all-plugin -- networking_spp.tests.tempest.scenario --serial"
test_spp_connect_vlan failed as follows:
---
Captured traceback:
~~~~~~~~~~~~~~~~~~~
    Traceback (most recent call last):
      File "/usr/local/lib/python2.7/dist-packages/networking_spp/tests/tempest/scenario/test_spp.py", line 135, in test_spp_connect_vlan
        self._test_spp_connect(**net_kwargs)
      File "/usr/local/lib/python2.7/dist-packages/networking_spp/tests/tempest/scenario/test_spp.py", line 53, in _test_spp_connect
        cidr=netaddr.IPNetwork('30.0.0.0/28'))
      File "/opt/stack/neutron-tempest-plugin/neutron_tempest_plugin/api/base.py", line 363, in create_subnet
        raise ValueError(message)
    ValueError: Available CIDR for subnet creation could not be found
---

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/578697

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/578697
Committed: https://git.openstack.org/cgit/openstack/networking-spp/commit/?id=8157e571fb6ac47c7f060bb7a9966282088b1b3a
Submitter: Zuul
Branch: master

commit 8157e571fb6ac47c7f060bb7a9966282088b1b3a
Author: Itsuro Oda <email address hidden>
Date: Thu Jun 28 15:13:56 2018 +0900

    make CIDR unreserved

    This fix is necessary because create_subnet of neutron-tempest-plugin
    was changed to reserve CIDR. It is inconvenient for our test.

    Change-Id: I3fcd169399e67e729f106424ed69667aac27bf95
    Closes-Bug: #1779059