[rally] Include openstack/rally-openstack package

Some time ago, Rally team moved in-tree OpenStack plugins to the
separate repository for simplification of requirements and release
management.

All previous releases of openstack/rally-openstack package were
processed by pushing local tag throw gerrit.

This patch adds information about rally-opensatck repository and
existing releases, so it will be possible to cut new releases throw the
unified and common process (by pushing a proper change to
openstack/releases project).

Change-Id: I5cad1186cde0adc2f1d142280f386b0bcb4af501

deliverables/_independent/rally-openstack.yaml

@@ -0,0 +1,21 @@
+---
+launchpad: rally
+team: rally
+type: other
+release-notes: https://git.openstack.org/cgit/openstack/rally-openstack/tree/CHANGELOG.rst
+include-pypi-link: yes
+releases:
+  - version: 1.0.0
+    projects:
+      - repo: openstack/rally-openstack
+        hash: 935cd73368330a512f16ca2a48f86d089ecf1323
+  - version: 1.1.0
+    projects:
+      - repo: openstack/rally-openstack
+        hash: 0c8bde161787ed4b7c899446a18c9327bcea51de
+  - version: 1.2.0
+    projects:
+      - repo: openstack/rally-openstack
+        hash: 79c8d39468e8d41acc1406cf39568d59db4ba308
+repository-settings:
+  openstack/rally-openstack: {}

deliverables/_independent/rally.yaml

@@ -2,7 +2,7 @@
 launchpad: rally
 team: rally
 type: other
-release-notes: http://rally.readthedocs.io/en/latest/project_info/release_notes/archive.html
+release-notes: https://git.openstack.org/cgit/openstack/rally/tree/CHANGELOG.rst
 include-pypi-link: yes
 branches:
   - name: stable/0.9