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: I45a97388ad70533570431c10493544a22f2798c2

.zuul.yaml

@@ -42,9 +42,9 @@
     parent: devstack
     description: |
       Base job for devstack-based functional tests
-    pre-run: playbooks/devstack/pre
-    run: playbooks/devstack/run
-    post-run: playbooks/devstack/post
+    pre-run: playbooks/devstack/pre.yaml
+    run: playbooks/devstack/run.yaml
+    post-run: playbooks/devstack/post.yaml
     required-projects:
       # These jobs will DTRT when shade triggers them, but we want to make
       # sure stable branches of shade never get cloned by other people,
@@ -58,25 +58,25 @@
     timeout: 9000
     vars:
       devstack_localrc:
-        SWIFT_HASH: "1234123412341234"
+        SWIFT_HASH: '1234123412341234'
       devstack_local_conf:
         post-config:
-          "$CINDER_CONF":
+          $CINDER_CONF:
             DEFAULT:
               osapi_max_limit: 6
       devstack_services:
-        ceilometer-acentral: False
-        ceilometer-acompute: False
-        ceilometer-alarm-evaluator: False
-        ceilometer-alarm-notifier: False
-        ceilometer-anotification: False
-        ceilometer-api: False
-        ceilometer-collector: False
-        horizon: False
-        s-account: True
-        s-container: True
-        s-object: True
-        s-proxy: True
+        ceilometer-acentral: false
+        ceilometer-acompute: false
+        ceilometer-alarm-evaluator: false
+        ceilometer-alarm-notifier: false
+        ceilometer-anotification: false
+        ceilometer-api: false
+        ceilometer-collector: false
+        horizon: false
+        s-account: true
+        s-container: true
+        s-object: true
+        s-proxy: true
       devstack_plugins:
         heat: https://git.openstack.org/openstack/heat
       tox_environment:
@@ -89,7 +89,7 @@
         SHADE_HAS_MAGNUM: 0
         SHADE_HAS_NEUTRON: 1
         SHADE_HAS_SWIFT: 1
-      tox_install_siblings: False
+      tox_install_siblings: false
       tox_envlist: functional
       zuul_work_dir: src/git.openstack.org/openstack-infra/shade
 
@@ -102,7 +102,7 @@
     voting: false
     vars:
       devstack_localrc:
-        ENABLE_IDENTITY_V2: True
+        ENABLE_IDENTITY_V2: true
         FLAT_INTERFACE: br_flat
         PUBLIC_INTERFACE: br_pub
       tox_environment:
@@ -139,7 +139,7 @@
       - name: openstack/keystoneauth
       - name: openstack/os-client-config
     vars:
-      tox_install_siblings: True
+      tox_install_siblings: true
 
 - job:
     name: shade-functional-devstack-tips-python3
@@ -163,13 +163,13 @@
       devstack_plugins:
         magnum: https://git.openstack.org/openstack/magnum
       devstack_localrc:
-        MAGNUM_GUEST_IMAGE_URL: "https://tarballs.openstack.org/magnum/images/fedora-atomic-f23-dib.qcow2"
+        MAGNUM_GUEST_IMAGE_URL: https://tarballs.openstack.org/magnum/images/fedora-atomic-f23-dib.qcow2
         MAGNUM_IMAGE_NAME: fedora-atomic-f23-dib
       devstack_services:
-        s-account: False
-        s-container: False
-        s-object: False
-        s-proxy: False
+        s-account: false
+        s-container: false
+        s-object: false
+        s-proxy: false
       tox_environment:
         SHADE_HAS_SWIFT: 0
         SHADE_HAS_MAGNUM: 1
@@ -194,7 +194,7 @@
     #   - github.com/ansible/ansible
     voting: false
     vars:
-      tox_install_siblings: True
+      tox_install_siblings: true
 
 - project-template:
     name: shade-functional-tips