[keystone-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: Ica4b732bb59f17b44cc0ad92a086e4da49f43021

deliverables/train/keystone-tempest-plugin.yaml

@@ -13,3 +13,7 @@ releases:
     projects:
       - repo: openstack/keystone-tempest-plugin
         hash: 806103f188cd9a56f1b2b81d86a8d2413cffff5d
+  - version: train-last
+    projects:
+      - repo: openstack/keystone-tempest-plugin
+        hash: faa9b1389186a9a81f91f67ac78df9c0b0343b3c

deliverables/xena/keystone-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: keystone_tempest_plugin
 team: keystone
 type: tempest-plugin
+releases:
+  - version: 0.8.0
+    projects:
+      - repo: openstack/keystone-tempest-plugin
+        hash: faa9b1389186a9a81f91f67ac78df9c0b0343b3c