Rialto to Millau Transfer Generator (#568)

* Add option to relay for sending transfers to Millau chain

* Endow derived accounts on Millau chain

* Update message generator entrypoint script to send transfers

* Use correct command when sending messages

* Send Root messages from Root origin on source chain

* Wrap calls from Root Origin in Sudo Call

* Allow Root to send messages without paying fees

* Use correct variable when sending messages to Rialto

* Print warning if no message type is provided to script.

* Add note mentioning that certain source origins aren't supported yet

* Use correct runtime when initializing header sync

* Remove option to send messages as Root

* Remove endowment of derived Root accounts

* Fix indentation.

Co-authored-by: Tomasz Drwięga <tomasz@parity.io>

bridges/bin/rialto/node/src/chain_spec.rs

@@ -122,7 +122,6 @@ impl Alternative {
 							get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
 							get_account_id_from_seed::<sr25519::Public>("George//stash"),
 							get_account_id_from_seed::<sr25519::Public>("Harry//stash"),
-							derive_account_from_millau_id(bp_runtime::SourceAccount::Root),
 							derive_account_from_millau_id(bp_runtime::SourceAccount::Account(
 								get_account_id_from_seed::<sr25519::Public>("Dave"),
 							)),
@@ -206,12 +205,3 @@ fn derived_dave_account_is_as_expected() {
 		"5Hg7WQyk8C1FmPzxY3xSjR7S6zZZC5sAL35vMr6NpW17jBhQ".to_string()
 	);
 }
-
-#[test]
-fn derived_root_account_is_as_expected() {
-	let root: AccountId = derive_account_from_millau_id(bp_runtime::SourceAccount::Root);
-	assert_eq!(
-		root.to_string(),
-		"5HYYwXQvxhgdcBYs6kzqfK1HW6M3UF3Kh4YM7j288yiqbhnt".to_string()
-	);
-}