tox: move pylint to separate environment (#61493)

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/combo/{env:BRANCH_NAME:}
-envlist = coverage-py3-django22-codestyle-pylint
+envlist = coverage-py3-django22-codestyle, pylint
 
 [testenv]
 usedevelop = True
@@ -38,5 +38,30 @@ commands =
   ./getlasso3.sh
   python manage.py compilemessages
   py.test {env:COVERAGE:} {posargs: --junitxml=junit-{envname}.xml tests/}
-  pylint: ./pylint.sh combo/ tests/
   codestyle: pre-commit run --all-files --show-diff-on-failure
+
+[testenv:pylint]
+setenv =
+  DJANGO_SETTINGS_MODULE=combo.settings
+  COMBO_SETTINGS_FILE=tests/settings.py
+  TOX_WORK_DIR={toxworkdir}
+  SETUPTOOLS_USE_DISTUTILS=stdlib
+  DB_ENGINE=django.db.backends.postgresql_psycopg2
+deps =
+  pytest-django
+  pytest-freezegun
+  pytest!=5.3.3
+  WebTest
+  mock<4
+  httmock
+  django-mellon>=1.13
+  pylint
+  pylint-django
+  django-webtest<1.9.3
+  pyquery
+  psycopg2-binary<2.9
+  git+https://git.entrouvert.org/debian/django-ckeditor.git
+  uwsgidecorators
+commands =
+  ./getlasso3.sh
+  ./pylint.sh combo/ tests/