Check the genesis hash in transactions regardless of era. (#3286)

* Check the genesis hash in transactions regardless of era.

* Fix check-fees, too.

* Undo.

* Subkey supports new signing.

* Remove unneeded type param.

* Bump tx version

* Build.

* Another build fix

* Build again

* Cleanup

* Another fix.

* Fix

* Fixes

* 6 second blocks.

* Fixes

* Build fix

* Fix

* Fix.

substrate/srml/executive/src/lib.rs

@@ -450,7 +450,7 @@ mod tests {
 		(
 			system::CheckEra::from(Era::Immortal),
 			system::CheckNonce::from(nonce),
-			system::CheckWeight::from(),
+			system::CheckWeight::new(),
 			balances::TakeFees::from(fee)
 		)
 	}