fix storage box permissions for backup-sync user

roles/common/defaults/main.yml

@@ -23,14 +23,14 @@ backup_group: "{{ backup_owner }}"
 backup_chroot_dir: /mnt/backup
 
 storage_box_enabled: no
-storage_box_host: storage.example.com
+storage_box_host: "{{ storage_box_username.split('-') | first }}.your-storagebox.de"
 storage_box_port: 23
 storage_box_path: /home/backup
 storage_box_mount:
   path: "{{ backup_chroot_dir }}"
   owner: "{{ backup_owner }}"
   group: "{{ backup_group }}"
-  options: [rw,default_permissions]
+  options: "{{ storage_box_default_mount_options }}"
 storage_box_username: u123456-sub1
 storage_box_password: somesecret