Add support http/https proxy for bootstrap-debian (#3932)

roles/bootstrap-os/tasks/bootstrap-debian.yml

@@ -13,6 +13,36 @@
   environment: {}
   tags: facts
 
+- name: Check http::proxy in /etc/apt/apt.conf
+  raw: grep -qs 'Acquire::http::proxy' /etc/apt/apt.conf
+  register: need_http_proxy
+  failed_when: false
+  changed_when: false
+  environment: {}
+  tags: facts
+
+- name: Add http_proxy to /etc/apt/apt.conf if http_proxy is defined
+  raw: echo 'Acquire::http::proxy "{{http_proxy}}";' >> /etc/apt/apt.conf
+  environment: {}
+  when:
+    - need_http_proxy.rc != 0
+    - https_proxy is defined
+
+- name: Check https::proxy in /etc/apt/apt.conf
+  raw: grep -qs 'Acquire::https::proxy' /etc/apt/apt.conf
+  register: need_https_proxy
+  failed_when: false
+  changed_when: false
+  environment: {}
+  tags: facts
+
+- name: Add https_proxy to /etc/apt/apt.conf if https_proxy is defined
+  raw: echo 'Acquire::https::proxy "{{https_proxy}}";' >> /etc/apt/apt.conf
+  environment: {}
+  when:
+    - need_http_proxy.rc != 0
+    - https_proxy is defined
+
 - name: Bootstrap | Install python 2.x, pip, and dbus
   raw:
     apt-get update && \