Zuul: add file extension to playbook path

Zuul now supports including the file extension on the playbook path
and omitting the extension is now deprecrated.  Update references
to include the extension.

Change-Id: If8ce35a5c1a93e86308507076f975df5a8b0720e

.zuul.yaml

@@ -18,8 +18,8 @@
 - job:
     name: vitrage-dsvm-api-py27
     parent: legacy-dsvm-base
-    run: playbooks/legacy/vitrage-dsvm-api-py27/run
-    post-run: playbooks/legacy/vitrage-dsvm-api-py27/post
+    run: playbooks/legacy/vitrage-dsvm-api-py27/run.yaml
+    post-run: playbooks/legacy/vitrage-dsvm-api-py27/post.yaml
     timeout: 7800
     required-projects:
       - openstack-infra/devstack-gate
@@ -32,8 +32,8 @@
 - job:
     name: vitrage-dsvm-api-py35
     parent: legacy-dsvm-base
-    run: playbooks/legacy/vitrage-dsvm-api-py35/run
-    post-run: playbooks/legacy/vitrage-dsvm-api-py35/post
+    run: playbooks/legacy/vitrage-dsvm-api-py35/run.yaml
+    post-run: playbooks/legacy/vitrage-dsvm-api-py35/post.yaml
     timeout: 7800
     required-projects:
       - openstack-infra/devstack-gate
@@ -46,8 +46,8 @@
 - job:
     name: vitrage-dsvm-datasources-py27
     parent: legacy-dsvm-base
-    run: playbooks/legacy/vitrage-dsvm-datasources-py27/run
-    post-run: playbooks/legacy/vitrage-dsvm-datasources-py27/post
+    run: playbooks/legacy/vitrage-dsvm-datasources-py27/run.yaml
+    post-run: playbooks/legacy/vitrage-dsvm-datasources-py27/post.yaml
     timeout: 7800
     required-projects:
       - openstack-infra/devstack-gate
@@ -60,8 +60,8 @@
 - job:
     name: vitrage-dsvm-datasources-py35
     parent: legacy-dsvm-base
-    run: playbooks/legacy/vitrage-dsvm-datasources-py35/run
-    post-run: playbooks/legacy/vitrage-dsvm-datasources-py35/post
+    run: playbooks/legacy/vitrage-dsvm-datasources-py35/run.yaml
+    post-run: playbooks/legacy/vitrage-dsvm-datasources-py35/post.yaml
     timeout: 7800
     required-projects:
       - openstack-infra/devstack-gate