Use synchronize for nodepool elements

This allows us to purge out of date data on the remote node.

Change-Id: I55fe331ed58eaba5df7472977c7ed4a84272c891
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

inventory/testing/group_vars/all.yaml

@@ -17,4 +17,4 @@ virtualenv_install_method: pip
 
 # windmill-config
 # TODO(pabelanger): Create windmill-config project on git.o.o.
-windmill_config_git_dest: ../config
+windmill_config_git_dest: "{{ lookup('pipe', 'pwd') | dirname }}/config"

playbooks/nodepool-builder.yaml

@@ -72,11 +72,12 @@
 
     - name: Install nodepool elements directory
       become: yes
-      copy:
+      synchronize:
+        delete: yes
         dest: /etc/nodepool/
-        group: nodepool
-        mode: preserve
-        owner: nodepool
+        perms: yes
+        rsync_opts:
+          - '--chown=nodepool:nodepool'
         src: "{{ windmill_config_git_dest }}/nodepool/elements"
 
     - name: Setup openstack.ssh role