This has bit-rotted as libraries have updated to Python 3 only.
Switch to hacking; some minor changes to regex-strings is all that is
required.
Drop py27 markers and move to Python 3 only. Update requirements.
Depends-On: https://review.opendev.org/737666
Change-Id: Iabf201965129b3284166e1aedcb9f1c9d6109077
Also remove invalid comment about setup.py being managed my requirements repo.
Change-Id: I0b3e604b14648f9ae52ca2381269c13cf9e1574f
Signed-off-by: Paul Belanger <pabelanger@redhat.com>