[ec2api-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: Ia6f554da377d77182b79240a96638d19a163a9b3

deliverables/train/ec2api-tempest-plugin.yaml

@@ -12,3 +12,7 @@ releases:
     projects:
       - repo: openstack/ec2api-tempest-plugin
         hash: 01a3bc472a680a22c63548a4bacd457f9e8b0f42
+  - version: train-last
+    projects:
+      - repo: openstack/ec2api-tempest-plugin
+        hash: aae0b12bd1906fb8fbb7d8037b68af382df61a15

deliverables/xena/ec2api-tempest-plugin.yaml

@@ -8,3 +8,8 @@ repository-settings:
   openstack/ec2api-tempest-plugin: {}
 team: ec2-api
 type: tempest-plugin
+releases:
+  - version: 1.3.0
+    projects:
+      - repo: openstack/ec2api-tempest-plugin
+        hash: aae0b12bd1906fb8fbb7d8037b68af382df61a15