companion for pallet order fix. (#4181)

* companion

* remove no-op duplicated function

* fmt

* add comment on constraint

* Run cargo update

* fix integration test

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

polkadot/runtime/kusama/src/lib.rs

@@ -1480,7 +1480,7 @@ construct_runtime! {
 		// Basic stuff; balances is uncallable initially.
 		System: frame_system::{Pallet, Call, Storage, Config, Event<T>} = 0,
 
-		// Must be before session.
+		// Babe must be before session.
 		Babe: pallet_babe::{Pallet, Call, Storage, Config, ValidateUnsigned} = 1,
 
 		Timestamp: pallet_timestamp::{Pallet, Call, Storage, Inherent} = 2,
@@ -1489,6 +1489,8 @@ construct_runtime! {
 		TransactionPayment: pallet_transaction_payment::{Pallet, Storage} = 33,
 
 		// Consensus support.
+		// Authorship must be before session in order to note author in the correct session and era
+		// for im-online and staking.
 		Authorship: pallet_authorship::{Pallet, Call, Storage} = 5,
 		Staking: pallet_staking::{Pallet, Call, Storage, Config<T>, Event<T>} = 6,
 		Offences: pallet_offences::{Pallet, Storage, Event} = 7,
@@ -1602,7 +1604,7 @@ pub type Executive = frame_executive::Executive<
 	Block,
 	frame_system::ChainContext<Runtime>,
 	Runtime,
-	AllPallets,
+	AllPalletsWithSystem,
 	(SessionHistoricalPalletPrefixMigration,),
 >;
 /// The payload being signed in the transactions.