Added support for proxies in the download process.

roles/download/tasks/main.yml

@@ -20,6 +20,10 @@
     mode: "{{ download.mode|default(omit) }}"
   when: "{{ download.enabled|bool }}"
   run_once: "{{ download_run_once|bool }}"
+  environment:
+    http_proxy: "{{ http_proxy }}"
+    https_proxy: "{{ https_proxy }}"
+    no_proxy: "{{ no_proxy }}"
 
 - name: Extract archives
   unarchive: