Ignore import scripts in code coverage

.coveragerc

+[run]
+omit =
+	representatives_positions/contrib/*
+	representatives_recommendations/contrib/*

pytest.ini

 [pytest]
 DJANGO_SETTINGS_MODULE=memopol.settings
-addopts = --cov=. --create-db
+addopts = --cov-config .coveragerc --cov=. --create-db