[zun-tempest-plugin] Tag train-last

Train branch is in Extended Maintenance now[1]. Tempest and
tempest plugins are branchless which means master version of
Tempest and its plugins is used to test the supported stable
branches.

Once any stable branch is moved to EM state then, Tempest and
its plugins compatible tag[2] needs to be released so that we can
keep testing the EM stable branches with that tag once master
Tempest and its plugins are not compatible[3].

Tagging 'train-last'[4] as well as a new version also with same hash.

[1] https://releases.openstack.org/train/index.html
[2] https://docs.openstack.org/tempest/latest/stable_branch_support_policy.html
[3] https://docs.openstack.org/tempest/latest/tempest_and_plugins_compatible_version_policy.html
[4] https://docs.openstack.org/project-team-guide/stable-branches.html#extended-maintenance

Change-Id: Id71cc7d697dbdf53ed9252e463ce82182be7545b

deliverables/train/zun-tempest-plugin.yaml

@@ -13,3 +13,7 @@ releases:
     projects:
       - repo: openstack/zun-tempest-plugin
         hash: 0d639a465ea289781d5a3cb96fb283a85a284007
+  - version: train-last
+    projects:
+      - repo: openstack/zun-tempest-plugin
+        hash: 9e0cf8fe919e6a807161b0e26363d532aa4cbdc8

deliverables/xena/zun-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: zun-tempest-plugin
 team: zun
 type: tempest-plugin
+releases:
+  - version: 4.4.0
+    projects:
+      - repo: openstack/zun-tempest-plugin
+        hash: 9e0cf8fe919e6a807161b0e26363d532aa4cbdc8