- port away from filter (list comprehension is the suggested way);
- explicitly convert the result of map to a list (thus simulating
the Python 2 behavior);
- remove the last (newly introduced) relative import;
- add a temporary py35 job to avoid clashes with the future
official job from project-config.
Python 3 unit tests should pass now.
Story: 2002574
Task: 22141
Change-Id: I73786ed5ca238da1236e6847e25d4435aeebbd87
998025e5a6