Remove old service, 3rd try (#1776)

* Remove old service, 3rd try

i.e.
Revert "Revert "Remove Old Service, 2nd try (#1732)" (#1758)"

This reverts commit 9a0f08bfe1.

Closes #1757.

We now have some evidence that the polkadot validator was producing
blocks after all; the reason the blocks_constructed metric was 0 was
that as a new metric it hadn't yet been incorporated into that
branch's codebase. See
https://github.com/paritytech/polkadot/issues/1757#issuecomment-700977602

As this PR is based on a newer `master` branch than the previous one,
that should hopefully no longer be an issue.

* paras trait now has an Origin type

* initial work running a two node local net

* use the right incantations so the nodes produce blocks together

* improve internal documentation

Co-authored-by: Bastian Köcher <git@kchr.de>

polkadot/runtime/rococo-v1/src/lib.rs

@@ -54,6 +54,8 @@ use sp_runtime::{
 };
 use pallet_im_online::sr25519::AuthorityId as ImOnlineId;
 use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
+#[cfg(any(feature = "std", test))]
+use sp_version::NativeVersion;
 use sp_version::RuntimeVersion;
 use pallet_transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
 use pallet_grandpa::{AuthorityId as GrandpaId, fg_primitives};
@@ -74,6 +76,7 @@ use runtime_parachains::router as parachains_router;
 use runtime_parachains::scheduler as parachains_scheduler;
 
 pub use pallet_balances::Call as BalancesCall;
+pub use pallet_staking::StakerStatus;
 
 /// Constant values used within the runtime.
 pub mod constants;
@@ -407,6 +410,16 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	transaction_version: 2,
 };
 
+/// Native version.
+#[cfg(any(feature = "std", test))]
+pub fn native_version() -> NativeVersion {
+	NativeVersion {
+		runtime_version: VERSION,
+		can_author_with: Default::default(),
+	}
+}
+
+
 parameter_types! {
 	pub const Version: RuntimeVersion = VERSION;
 }