* runtime(kusama/polkadot): migrations for membership storage prefix

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Fix

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* make correct custom migration

* some fix

* Update

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Fix format

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* import traits

* update Substrate

Co-authored-by: thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: parity-processbot <>