Set sensible locales

Signed-off-by: Thomas Schneider <thomas@fsmpi.rwth-aachen.de>

client/tasks/locale.yml

 ---
 #file: roles/client/tasks/locale.yml
 
-- name: ensure german is installed on clients
+- name: ensure sensible locales are installed on clients
   locale_gen: name={{ item }} state=present
   with_items:
     - en_US.UTF-8
     - de_DE.UTF-8
+    - en_DK.UTF-8
   tags: 
     - locale