Switch to fedora-latest for testing

This makes it easier for openstack-infra to upgrade fedora nodes.

Change-Id: Ib5c4b285361c10d5bcdcdaa71d55537393b628d5
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

.zuul.yaml

@@ -13,9 +13,9 @@
     parent: ansible-role-zuul-base
 
 - job:
-    name: ansible-role-zuul-fedora-27
+    name: ansible-role-zuul-fedora-latest
     parent: ansible-role-zuul
-    nodeset: fedora-27
+    nodeset: fedora-latest
 
 - job:
     name: ansible-role-zuul-ubuntu-bionic
@@ -38,9 +38,9 @@
       zuul_install_method: git
 
 - job:
-    name: ansible-role-zuul-src-fedora-27
+    name: ansible-role-zuul-src-fedora-latest
     parent: ansible-role-zuul-src
-    nodeset: fedora-27
+    nodeset: fedora-latest
 
 - job:
     name: ansible-role-zuul-src-ubuntu-bionic
@@ -54,22 +54,22 @@
 
 - project:
     templates:
-      - windmill-jobs-fedora-27
+      - windmill-jobs-fedora-latest
       - windmill-jobs-bionic
       - windmill-jobs-xenial
     check:
       jobs:
-        - ansible-role-zuul-fedora-27
+        - ansible-role-zuul-fedora-latest
         - ansible-role-zuul-ubuntu-bionic
         - ansible-role-zuul-ubuntu-xenial
-        - ansible-role-zuul-src-fedora-27
+        - ansible-role-zuul-src-fedora-latest
         - ansible-role-zuul-src-ubuntu-bionic
         - ansible-role-zuul-src-ubuntu-xenial
         - tox-linters
     gate:
       jobs:
-        - ansible-role-zuul-fedora-27
+        - ansible-role-zuul-fedora-latest
         - ansible-role-zuul-ubuntu-xenial
-        - ansible-role-zuul-src-fedora-27
+        - ansible-role-zuul-src-fedora-latest
         - ansible-role-zuul-src-ubuntu-xenial
         - tox-linters