The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.
Fix problems found by updated hacking version.
Update local hacking checks for new flake8.
Remove hacking and friends from lower-constraints, they are not
needed in installations.
Change-Id: I67e5ca24c550163c218fb06692de0b7c528d8318
We said 'bye' to Python 2 already. So let us use Python 3 for all
scripts.
Unversioned Python binary should be avoided as it may be Python2 or
Python3 (depends on distribution).
Implements: blueprint drop-py2-support
Change-Id: Ifd7912a3debf3ee4ddd8f3e1a4c5870848d4d688
All json file in Kolla are json.j2 file, it shold be render as jinja
template, then validate by using json.
Change-Id: Ibabbe435116fd255d68347e00407156db76fedfe
Closes-Bug: #1634447
