Add port as an argument to session

[progwriter]

Add port param, prefer it over port_v2, but keep the latter for backwards compatibility

Fixes #917

[batfish-bot]

This change is 

[arifogel]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @progwriter)

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tests/client/test_session.py line 104 at r1 (raw file):

def test_port_set():
    s = Session(api_key="foo", port=8888, load_questions=False)
    assert s.port_v2 == 8888

Nit: Can you also set port_v2 here to prove priority?

[progwriter]

Reviewable status: 1 of 2 files reviewed, all discussions resolved (waiting on @arifogel)

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tests/client/test_session.py line 104 at r1 (raw file):

Previously, arifogel (Ari Fogel) wrote…

Nit: Can you also set port_v2 here to prove priority?

done

[arifogel]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @progwriter)

[arifogel]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @progwriter)