rally: add rally-openstack in source - follow up

Follow up to change [0]
rally-openstack added as plugin to rally source image.
Changed rally tarball to latest available version,
as rally does not build tarbals from master branch anymore.

[0]: https://review.opendev.org/#/c/757542/
Closes-Bug: #1803968

Change-Id: I26dd3a02e5e0131f52eac1380562b610eea3a36f

docker/rally/Dockerfile.j2

@@ -27,16 +27,24 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 {% elif install_type == 'source' %}
 
 ADD rally-archive /rally-source
+ADD plugins-archive /
 
 {% set rally_pip_packages = [
     '/rally',
     'os-testr'
 ] %}
 
+{% set rally_plugins_pip_packages = [
+    '/plugins/*'
+] %}
+
 RUN ln -s rally-source/* rally \
     && {{ macros.install_pip(rally_pip_packages | customizable("pip_packages")) }} \
     && mkdir -p /etc/rally \
-    && chown -R rally: /etc/rally
+    && chown -R rally: /etc/rally \
+    && if [ "$(ls /plugins)" ]; then \
+        {{ macros.install_pip(rally_plugins_pip_packages) }}; \
+    fi
 {% endif %}
 
 COPY extend_start.sh /usr/local/bin/kolla_extend_start

kolla/common/config.py

@@ -719,8 +719,8 @@ SOURCES = {
     'rally': {
         'type': 'url',
         'location': ('$tarballs_base/openstack/rally/'
-                     'rally-master.tar.gz')},
-    'rally-openstack': {
+                     'rally-3.1.0.tar.gz')},
+    'rally-plugin-openstack': {
         'type': 'url',
         'location': ('$tarballs_base/openstack/rally-openstack/'
                      'rally-openstack-2.0.0.tar.gz')},

releasenotes/notes/rally-openstack-source-62f3ac8f156fc758.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Added rally-openstack as plugin to rally source image