55410888de
This patch is fixing the pep8 warning messages when running "tox -epep8" with the python3.5 interpreter (the default on some distros, e.g Arch Linux). The method file_open() from common/utils.py was removed because it wasn't being used anywhere and was violating pep8 by using file() which is only present in python2. Change-Id: Ie9356a870ea7b271aa44db57accba02f52b3e948 Closes-Bug: #1617947