Promote bast-test change for configure-unbound

This has been tested with:

  http://logs.openstack.org/28/587128/1/check/windmill-fedora-latest/c1fb677/job-output.txt.gz

And does seem to address the validate-host error:

  No viable v4 or v6 route found to git.openstack.org. The build node is
  assumed to be invalid

Change-Id: Ib9145d91de9b5cd574cbe203037a2144dcd53b9a
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

playbooks/base-test/pre.yaml

@@ -21,8 +21,9 @@
 - hosts: all
   roles:
     # NOTE(pabelanger): We run this role in its own play to ensure unbound is
-    # restarted before proceeding with any other role.  This is because of
-    # how handlers work in ansible.
+    # restarted before proceeding with any other role. This is because we use
+    # notify / handler to restart the unbound service. With ansible notify
+    # actions are triggered at the end of each block of tasks in a play.
     - configure-unbound
 
 - hosts: all

playbooks/base/pre.yaml

@@ -16,7 +16,17 @@
   roles:
     - add-build-sshkey
     - start-zuul-console
+
+- hosts: all
+  roles:
+    # NOTE(pabelanger): We run this role in its own play to ensure unbound is
+    # restarted before proceeding with any other role. This is because we use
+    # notify / handler to restart the unbound service. With ansible notify
+    # actions are triggered at the end of each block of tasks in a play.
     - configure-unbound
+
+- hosts: all
+  roles:
     - validate-host
     - use-cached-repos
     - mirror-workspace-git-repos