One node two runtimes (#191)

* One node two runtimes

This enables the rococo-collator to run the normal and the contracts runtime.

* Fix tests

rococo-parachains/pallets/token-dealer/src/lib.rs

@@ -17,7 +17,8 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 use frame_support::{
-	decl_event, decl_module, dispatch::DispatchResult,
+	decl_event, decl_module,
+	dispatch::DispatchResult,
 	traits::{Currency, ExistenceRequirement, WithdrawReason},
 };
 use frame_system::ensure_signed;