Merge branch 'fix-offsite-backup-ansible' into 'master'

Fix offsite backup ansible playbooks

See merge request !408

roles/hetzner_storagebox/templates/authorized_keys.j2

 #jinja2: lstrip_blocks: True
 # Arch DevOps keys
-{% for user in root_ssh_keys | sort -%}
-	{{ lookup('file', '../pubkeys/' + user) }}
+{% for user in root_ssh_keys | sort(attribute='key') -%}
+	{{ lookup('file', '../pubkeys/' + user.key) }}
 {% endfor %}
 
 # Client machines keys

roles/rsync_net/templates/authorized_keys.j2

 #jinja2: lstrip_blocks: True
 # Arch DevOps keys
-{% for user in root_ssh_keys | sort -%}
-	{{ lookup('file', '../pubkeys/' + user) }}
+{% for user in root_ssh_keys | sort(attribute='key') -%}
+	{{ lookup('file', '../pubkeys/' + user.key) }}
 {% endfor %}
 
 # Client machines keys