tox failing for py27 on development environment

[Daniel de Oliveira Pereira]

I just try running tox on my development environment and got the following error:

ERROR: Could not find a version that satisfies the requirement hacking<3.2.0,>=3.1.0 (from -r /home/dopereira/Projects/OpenDev/stackalytics/test-requirements.txt (line 6)) (from versions: 0.5.0, 0.5.1, 0.5.2, 0.5.3, 0.5.4, 0.5.5, 0.5.6, 0.6.0, 0.7.0, 0.7.1, 0.7.2, 0.8.0, 0.8.1, 0.9.0, 0.9.1, 0.9.2, 0.9.3, 0.9.4, 0.9.5, 0.9.6, 0.9.7, 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.11.0, 0.12.0, 0.13.0, 1.0.0, 1.1.0, 2.0.0)
ERROR: No matching distribution found for hacking<3.2.0,>=3.1.0 (from -r /home/dopereira/Projects/OpenDev/stackalytics/test-requirements.txt (line 6))

Please, see the attached file for the full log.

It seems the package hacking >=3.0.0 doesn't support Python 2.7 anymore, so it's not possible to satisfy that requirement when running tox with py27.

Since tox with testenv py27 isn't being executed on CI, it doesn't affect the CI results.