Add support to use bifrost-deploy behind proxy

Change-Id: If90c2dfd32c8bc50671f6dd38e5a82b434c07151
Depends-On: https://review.opendev.org/#/c/720338

ansible/roles/bifrost/tasks/start.yml

@@ -7,6 +7,7 @@
     image: "{{ bifrost_deploy_image_full }}"
     name: "bifrost_deploy"
     privileged: True
+    environment: "{{ container_proxy }}"
     volumes:
       - "{{ node_config_directory }}/bifrost/:/etc/bifrost:ro"
       - "/etc/localtime:/etc/localtime:ro"

releasenotes/notes/bifrost-deploy-behind-proxy-e41f84e8d49a9ddf.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Add support to use bifrost-deploy behind proxy. It uses existing
+    container_proxy variable.