Parachain improvements (#1905)

* Parachain improvements

- Set the parachains configuration in Rococo genesis
- Don't stop the overseer when a subsystem job is stopped
- Several small code changes

* Remove unused functionality

* Return error from the runtime instead of printing it

* Apply suggestions from code review

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

* Update primitives/src/v1.rs

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

* Update primitives/src/v1.rs

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

* Fix test

* Revert "Update primitives/src/v1.rs"

This reverts commit 11fce2785acd1de481ca57815b8e18400f09fd52.

* Revert "Update primitives/src/v1.rs"

This reverts commit d6439fed4f954360c89fb1e12b73954902c76a41.

* Revert "Return error from the runtime instead of printing it"

This reverts commit cb4b5c0830ac516a6d54b2c24197e9354f2b98cb.

* Revert "Fix test"

This reverts commit 0c5fa1b5566d4cd3c55a55d485e707165ce7a59e.

* Update runtime/parachains/src/runtime_api_impl/v1.rs

Co-authored-by: Sergei Shulepov <sergei@parity.io>

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>
Co-authored-by: Sergei Shulepov <sergei@parity.io>

polkadot/Cargo.lock

@@ -5398,7 +5398,7 @@ dependencies = [
  "futures 0.3.5",
  "hex-literal 0.2.1",
  "libsecp256k1",
- "log 0.3.9",
+ "log 0.4.11",
  "pallet-authority-discovery",
  "pallet-authorship",
  "pallet-babe",
@@ -5418,7 +5418,6 @@ dependencies = [
  "rustc-hex",
  "sc-keystore",
  "serde",
- "serde_derive",
  "serde_json",
  "sp-api",
  "sp-application-crypto",
@@ -5475,6 +5474,7 @@ dependencies = [
  "polkadot-primitives",
  "polkadot-rpc",
  "polkadot-runtime",
+ "polkadot-runtime-parachains",
  "polkadot-statement-distribution",
  "polkadot-test-client",
  "rococo-runtime",