[octavia-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: I401f91c01f5fd72d8bcadd0f1cc2b15f255e2523

deliverables/train/octavia-tempest-plugin.yaml

@@ -16,3 +16,7 @@ releases:
     projects:
       - repo: openstack/octavia-tempest-plugin
         hash: 393d3c114a6ca4935a4d0e0bcf3e242e5cfcbf65
+  - version: train-last
+    projects:
+      - repo: openstack/octavia-tempest-plugin
+        hash: 29d8e61ca27859b70a4350e87022442a78f8fa8c

deliverables/xena/octavia-tempest-plugin.yaml

@@ -7,4 +7,9 @@ repository-settings:
   openstack/octavia-tempest-plugin: {}
 storyboard: 908
 team: octavia
+releases:
+  - version: 1.8.0
+    projects:
+      - repo: openstack/octavia-tempest-plugin
+        hash: 29d8e61ca27859b70a4350e87022442a78f8fa8c
 type: tempest-plugin