ansible: python3 for freebsd (for linting)

[rvagg]

/R= @cclauss

[cclauss]

What do we get when we python3 --version ?

Is there a py37-pip ?

[cclauss]

Related to #1639

[rvagg]

$ python3 --version
Python 3.6.7

there is a python37 package but it looks like python3 has given us python36, and I can't find a pip for 37

[cclauss]

✅ Let's stick with Python 3.6.7.

[cclauss]

✅ This change should enable us to add the command: make lint-py PYTHON=python3

[cclauss]

Do we need more approvals on this one?

[thefourtheye]

cc @nodejs/build

[mhdawson]

LGTM

[thefourtheye]

I believe this is ready to be merged. Can anybody from @nodejs/build take a look at this and merge?

[refack]

I'll run the playbook, update the job and if everything goes smoothly I'll merge.

[refack]

So the workers are setup, and the a cloned-edited job works as expected. That is fails with:

PYTHONPATH=tools/pip python3 -m flake8 . \
	--count --show-source --statistics --select=E901,E999,F821,F822,F823 \
	--exclude=.git,deps,lib,src,tools/*_macros.py,tools/gyp,tools/inspector_protocol,tools/jinja2,tools/markupsafe,tools/pip
./test/fixtures/wpt/encoding/resources/single-byte-raw.py:3:52: F821 undefined name 'xrange'
  response.content = "".join(chr(byte) for byte in xrange(255))
                                                   ^
1     F821 undefined name 'xrange'
1
gmake: *** [Makefile:1295: lint-py] Error 1

A PR was opened in upstream WPT repo - web-platform-tests/wpt#14973
and in node core - nodejs/node#25614

[refack]

Has been run on worker.