Add ParasSudoWrapper to test-runtime and bring back register_parachain to test-service (#1811)

* Make register/deregister parachain dispatchables

This makes `register_parachain` and `deregister_parachain` of
`Registrar` dispatchables.

Besides that it brings back the functionality of the test node to
register a parachain.

* Fix tests

* PR review comments

polkadot/runtime/test-runtime/src/lib.rs

@@ -37,7 +37,7 @@ use primitives::v1::{
 	PersistedValidationData, Signature, ValidationCode, ValidationData, ValidatorId, ValidatorIndex,
 };
 use runtime_common::{
-	claims, SlowAdjustingFeeUpdate,
+	claims, SlowAdjustingFeeUpdate, paras_sudo_wrapper,
 	BlockHashCount, MaximumBlockWeight, AvailableBlockRatio,
 	MaximumBlockLength, BlockExecutionWeight, ExtrinsicBaseWeight, ParachainSessionKeyPlaceholder,
 };
@@ -74,6 +74,7 @@ pub use pallet_staking::StakerStatus;
 pub use sp_runtime::BuildStorage;
 pub use pallet_timestamp::Call as TimestampCall;
 pub use pallet_balances::Call as BalancesCall;
+pub use paras_sudo_wrapper::Call as ParasSudoWrapperCall;
 
 /// Constant values used within the runtime.
 pub mod constants;
@@ -448,6 +449,8 @@ impl router::Trait for Runtime {}
 
 impl scheduler::Trait for Runtime {}
 
+impl paras_sudo_wrapper::Trait for Runtime {}
+
 construct_runtime! {
 	pub enum Runtime where
 		Block = Block,
@@ -487,8 +490,8 @@ construct_runtime! {
 		Initializer: initializer::{Module, Call, Storage},
 		Paras: paras::{Module, Call, Storage, Origin},
 		Scheduler: scheduler::{Module, Call, Storage},
+		ParasSudoWrapper: paras_sudo_wrapper::{Module, Call},
 
-		// Sudo. Last module.
 		Sudo: pallet_sudo::{Module, Call, Storage, Config<T>, Event<T>},
 	}
 }