guest-overlay: switch to sddm

guest-overlay/handlers/main.yml

 ---
 # file: roles/guest-overlay/handlers/main.yml
 
-- name: restart kdm
-  service: name=kdm state=restarted
+- name: restart sddm
+  service: name=sddm state=restarted

guest-overlay/tasks/main.yml

@@ -62,7 +62,7 @@
 - name: deployment of our pam-mount config
   copy: src=pam_mount.conf.xml dest=/etc/security/pam_mount.conf.xml
   notify:
-    - restart kdm
+    - restart sddm
   tags:
     - guest-overlay
     - config