Remove keystone directory on source installs

Current behavior only attempts to remove the keystone
directory from the first container and skips
additional containers past the first one.  This
caused upgrades to break as the configs were
still present in any additional containers.

This ensures the keystone directory is removed on
all keystone containers when the install method is
is source.

Change-Id: If588f9ed4bc5d0deeb2b9c1bbeea5e9eb5ce7c79

tasks/keystone_pre_install.yml

@@ -71,16 +71,22 @@
       stat:
         path: "/etc/keystone"
       register: keystone_conf_dir_stat
+      with_items:
+        - "{{ ansible_play_hosts }}"
 
     - name: Remove the config directory
       file:
         path: "/etc/keystone"
         state: absent
+      with_items:
+        - "{{ keystone_conf_dir_stat.results }}"
+      delegate_to: "{{ item.item }}"
       when:
-        - keystone_conf_dir_stat.stat.isdir is defined and
-          keystone_conf_dir_stat.stat.isdir
+       - item.stat.isdir is defined and
+         item.stat.isdir
   when:
     - keystone_install_method == 'source'
+    - "inventory_hostname == ansible_play_hosts[0]"
 
 # The fernet key repository is needed on all hosts even if only running against
 # one host, so the delegation preps the directories on all hosts at once.