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/Cargo.lock

@@ -4730,7 +4730,6 @@ dependencies = [
  "futures 0.3.5",
  "log 0.4.11",
  "polkadot-service",
- "polkadot-service-new",
  "sc-cli",
  "sc-client-api",
  "sc-client-db",
@@ -5374,65 +5373,6 @@ dependencies = [
 
 [[package]]
 name = "polkadot-service"
-version = "0.8.25"
-dependencies = [
- "env_logger",
- "frame-benchmarking",
- "frame-system-rpc-runtime-api",
- "futures 0.3.5",
- "hex-literal 0.2.1",
- "kusama-runtime",
- "lazy_static",
- "log 0.4.11",
- "pallet-babe",
- "pallet-im-online",
- "pallet-staking",
- "pallet-transaction-payment-rpc-runtime-api",
- "parity-scale-codec",
- "parking_lot 0.9.0",
- "polkadot-primitives",
- "polkadot-rpc",
- "polkadot-runtime",
- "polkadot-test-runtime-client",
- "polkadot-validation",
- "sc-authority-discovery",
- "sc-block-builder",
- "sc-chain-spec",
- "sc-client-api",
- "sc-client-db",
- "sc-consensus",
- "sc-consensus-babe",
- "sc-executor",
- "sc-finality-grandpa",
- "sc-keystore",
- "sc-network",
- "sc-service",
- "sc-telemetry",
- "sc-transaction-pool",
- "serde",
- "slog",
- "sp-api",
- "sp-authority-discovery",
- "sp-block-builder",
- "sp-blockchain",
- "sp-consensus",
- "sp-consensus-babe",
- "sp-core",
- "sp-finality-grandpa",
- "sp-inherents",
- "sp-io",
- "sp-offchain",
- "sp-runtime",
- "sp-session",
- "sp-storage",
- "sp-transaction-pool",
- "sp-trie",
- "substrate-prometheus-endpoint",
- "westend-runtime",
-]
-
-[[package]]
-name = "polkadot-service-new"
 version = "0.8.3"
 dependencies = [
  "env_logger",
@@ -5452,10 +5392,12 @@ dependencies = [
  "polkadot-node-core-proposer",
  "polkadot-node-subsystem",
  "polkadot-overseer",
+ "polkadot-parachain",
  "polkadot-primitives",
  "polkadot-rpc",
  "polkadot-runtime",
  "polkadot-test-runtime-client",
+ "rococo-v1-runtime",
  "sc-authority-discovery",
  "sc-block-builder",
  "sc-chain-spec",
@@ -5560,6 +5502,7 @@ dependencies = [
  "polkadot-parachain",
  "polkadot-primitives",
  "polkadot-runtime-common",
+ "polkadot-runtime-parachains",
  "rustc-hex",
  "serde",
  "serde_derive",
@@ -5621,6 +5564,7 @@ dependencies = [
  "pallet-balances",
  "pallet-staking",
  "pallet-transaction-payment",
+ "polkadot-overseer",
  "polkadot-primitives",
  "polkadot-rpc",
  "polkadot-runtime-common",