Resolve "Create a collection"

Closes #38 (closed) and #25 (closed) #27 (closed) #37 (closed)

roles/ynh_setup/defaults/main.yml

@@ -25,7 +25,7 @@ ynh_admin_password: MYINSECUREPWD_PLZ_OVERRIDE_THIS
 
 ynh_symlink:
   enabled: False
-  appdata_dir: "/data/var"
+  data_dir: "/data/var/"
   conf_dir: "/data/etc/"
 
 # The list of Yunohost domains.