Companion for sub/7040 (#1719)

* Companion for sub/7040

* Fix duplicate type.

* Fix syntax

* Sync with latest changes.

* Add weight info.

* Fix build

* Fix some tests

* Fix build again.

* fix migration amounts.

* new migration

* Builds fine with dummy weights.

* fix build

* Add correct weight files.

* Fix to latest version

* remove unneeded upgrade.

* Update to latest again.

* "Update Substrate"

Co-authored-by: parity-processbot <>