Integration tests not working on the correct python virtualenv in vagrant

[jorisroovers]

When running the integration tests in the vagrant box (./run_tests_.sh -i) from a virtualenv (e.g. .venv27 on the vagrant box), the qa/test_hooks.py file will actually use the system-wide python installation. This is because the commit-msg hook shell script contains python -m gitlint.cli which won't use the currently active virtualenv.

See

gitlint/gitlint/files/commit-msg

Line 29 in ea698dd

cat "$1" | python -m gitlint.cli

This should be fixed because now developers have the impression that the integration tests for the gitlint hooks are ran against all the python virtualenvs, while in reality they're only ran against the systemwide python installation.