check nosy_list supported before migrating it...
rql('SET X target "apycot.pylint" WHERE X is RecipeStep, X target "apycot.python.pylint"',
ask_confirm=True)
commit()
if 'nosy_list' in schema and ('TestConfig', 'CWUser') in schema['nosy_list'].rdefs:
rql('SET U interested_in PE WHERE TC use_environment PE, '
'U interested_in TC, NOT U interested_in PE',
ask_confirm=True)
drop_relation_definition('CWUser', 'interested_in', 'TestConfig')
drop_relation_definition('TestConfig', 'nosy_list', 'CWUser')