Fix 2976

Fix failure when the container attribute is not set for a download

roles/download/tasks/main.yml

@@ -20,6 +20,6 @@
   when:
     - not skip_downloads|default(false)
     - item.value.enabled
-    - item.value.container
+    - "{{ item.value.container | default(False) }}"
     - download_run_once
     - group_names | intersect(download.groups) | length