Merge ~smoser/cloud-init:bug/1674946-openstack-add-dvs into cloud-init:master

[Scott Moser]

OpenStack: add 'dvs' to the list of physical link types.

Links presented in network_data.json to the guest running on ESXi
are of type 'dvs'.

LP: #1674946

[Lars Kellogg-Stedman (larsks)]

Seems fine to me, although I'm still in favor of just defaulting to something sane instead of throwing a ValueError for unknown link types.

review: Approve

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:61eb03fef92f435434d974fb46439189ef0b5f97
https://jenkins.ubuntu.com/server/job/cloud-init-ci/204/
Executed test runs:
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-amd64/204
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-arm64/204
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-ppc64el/204
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=metal-s390x/204
    SUCCESS: https://jenkins.ubuntu.com/server/job/cloud-init-ci/nodes=vm-i386/204

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/204/rebuild

review: Approve (continuous-integration)

diff --git a/cloudinit/sources/helpers/openstack.py b/cloudinit/sources/helpers/openstack.py
index 096062d..61cd36b 100644
--- a/cloudinit/sources/helpers/openstack.py
+++ b/cloudinit/sources/helpers/openstack.py
@@ -52,6 +52,7 @@ OS_VERSIONS = (
 PHYSICAL_TYPES = (
     None,
     'bridge',
+    'dvs',
     'ethernet',
     'hw_veb',
     'hyperv',