Update repo count and devstack playbook

src/gating/gating.rst

@@ -120,7 +120,7 @@ Large numbers of
 
   * Contributors (\~2k in any given 6 month period)
   * Changes
-  * Code Repositories (1904 as of this morning)
+  * Code Repositories (1930 as of this morning)
 
 OpenStack Scale Comparison
 ==========================
@@ -139,6 +139,7 @@ OpenStack Scale Comparison
   * 10,000 changes merged per month
 
   By comparison, our friends at the amazing project Ansible received
+
   13,000 changes and had merged 8,000 of them in its first 4 years.
 
 Four Opens
@@ -600,19 +601,25 @@ Playbooks
   https://github.com/projectatomic/bubblewrap
 * Playbooks are not allowed to execute content on 'localhost'
 
-Devstack-gate / Tempest Playbook
-================================
+devstack / Tempest Playbook
+===========================
 
 .. code:: yaml
 
-  # devstack-gate / tempest playbook
-  hosts: all
-  roles:
-    - setup-multinode-networking
-    - partition-swap
-    - configure-mirrors
-    - run-devstack
-    - run-tempest
+  # Changes that run through devstack-tempest are likely to have an impact on
+  # the devstack part of the job, so we keep devstack in the main play to
+  # avoid zuul retrying on legitimate failures.
+  - hosts: all
+    roles:
+      - run-devstack
+
+  # We run tests only on one node, regardless how many nodes are in the system
+  - hosts: tempest
+    roles:
+      - setup-tempest-run-dir
+      - setup-tempest-data-dir
+      - acl-devstack-files
+      - run-tempest
 
 Simple Shell Playbook
 =====================