[REF] pylint_pr.cfg: Deprecated unittest2 for new PR w/o affect build status

[moylop260]

More info about:

• Install unittest2 #460
• Migrate unittest2 to unittest for all oca projects #461

[pedrobaeza]

Well, this can be still legitimate for Odoo <=v10, so I'm not sure if this is the solution.

[moylop260]

The unittest2 package was removed from odoo requirements.txt since 9.0 version.
Maybe we are using this package without a real justification.

• https://github.com/OCA/product-attribute/blob/10.0/product_gtin/tests/test_product_gtin_functions.py (really is required unittest2?)
• https://github.com/OCA/l10n-argentina/blob/8.0/l10n_ar_wsfe/tests/test_sinchronize.py#L26 (unused import)
• https://github.com/OCA/partner-contact/blob/8.0/firstname_display_name_trigger/tests/test_display_name.py#L46-L47 (sentences useless)

NOTE: I have created this PR because your comment #460 (comment) so I don't know what is your proposal here

[moylop260]

Maybe @guewen could help us to resolve this doubt.

[lasley]

unittest2 is a backport of Python 2.7 features to 2.4-2.6. IMO those versions are ancient and anyone using them should update.