fix: add python3 support for ansible

CHANGELOG.md

@@ -7,6 +7,7 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ### Fixed
 
+- add full python3 support
 - remove useless no_log variable
 
 ## [1.3.0] - 2020-04-04

tasks/backend-dependencies-debian.yml

@@ -1,7 +1,9 @@
 ---
 - name: install backend dependencies
   package:
-    name: python-requests
+    name:
+      - python-requests
+      - python3-requests
   register: result
   retries: 3
   delay: 1