Fix etherpad git pull

Restart etherpad unit after pulling new version
Force update, don't fail pull if local files are changed.

etherpad/tasks/main.yml

@@ -36,8 +36,10 @@
     repo: https://github.com/ether/etherpad-lite.git
     dest: "{{etherpad_web_root}}/repository"
     version: "{{etherpad_version|default('HEAD')}}"
+    force: true
   become: true
   become_user: etherpad
+  notify: restart etherpad
 
 - name: ensure we have a directory for etherpad configuration files
   file: