Add splash screen to the gnome role.

roles/gnome/handlers/main.yml

@@ -1,3 +1,7 @@
 - name: update dconf
   command: dconf update
   listen: update dconf
+
+- name: update grub
+  command: update-grub
+  listen: update grub

roles/gnome/tasks/main.yml

@@ -33,3 +33,10 @@
     dest: "/etc/cups/cups-files.conf"
     regexp: '^(SystemGroup lpadmin)$'
     replace: '\1 root'
+
+- name: enable splash screen
+  replace:
+    dest: "/etc/default/grub"
+    regexp: '"quiet"$'
+    replace: '"quiet splash"'
+  notify: update grub