Merge branch...
Merge branch 1898-using-extend_schema-on-viewset-class-listenviewset-with-parameters-operation_id-or-operation with refs/heads/develop into refs/merge-requests/2017/train
Merge branch 1898-using-extend_schema-on-viewset-class-listenviewset-with-parameters-operation_id-or-operation with refs/heads/develop into refs/merge-requests/2017/train