upgrade to buster (#30608)

correct :
- warning on apt
- error on iteritems(): replaced by items() when running under python3

roles/base/tasks/main.yml

@@ -1,9 +1,7 @@
 ---
 - name: Install system packages dependencies
   apt:
-    name: "{{ item }}"
-    state: present
-  with_items:
+    name:
        - acl
        - gettext
        - graphicsmagick
@@ -26,6 +24,7 @@
        - rabbitmq-server
        - ruby-sass
        - supervisor
+    state: present
   become: yes
 
 - name: "create the postgresql user named {{user}}"

roles/hobo-agent/templates/hobo-agent-settings.j2

@@ -2,12 +2,12 @@ BROKER_URL = 'amqp://'
 
 
 AGENT_HOST_PATTERNS = {
-{% for appkey, app in apps.iteritems() %}
+{% for appkey, app in apps.items() %}
      "{{appkey}}": ["{{app['host_pattern']}}"],
 {% endfor %}
 }
 
-{% for appkey, app in apps.iteritems() %}
+{% for appkey, app in apps.items() %}
 {% if appkey != 'wcs' %}
 {% filter upper %}{{appkey}}{% endfilter %}_MANAGE_COMMAND = "{{venv_bin}}/{{app['project_name']}}-manage"
 {% filter upper %}{{appkey}}{% endfilter %}_MANAGE_TRY_COMMAND = {% filter upper %}{{appkey}}{% endfilter %}_MANAGE_COMMAND