Pov recovery for parachains (#445)

* Start with a failing integration test & some refactorings

* More work

* Make it "work"

* Add `NullConsensus` for the test

* More refactorings

* Move stuff over to its own crate

* Refactorings

* Integrate it into `service` and make the test working

* Docs and some exit condition

* Use the real import queue

* Fix tests

* Update client/pov-recovery/src/active_candidate_recovery.rs

Co-authored-by: Bernhard Schuster <bernhard@ahoi.io>

* Fetch slot duration from the relay chain

* Docs

* Fixes

Co-authored-by: Bernhard Schuster <bernhard@ahoi.io>

Cargo.toml

@@ -5,6 +5,7 @@ members = [
 	"client/consensus/common",
 	"client/consensus/relay-chain",
 	"client/network",
+	"client/pov-recovery",
 	"client/service",
 	"pallets/aura-ext",
 	"pallets/dmp-queue",

client/collator/Cargo.toml

@@ -27,7 +27,7 @@ cumulus-primitives-core = { path = "../../primitives/core" }
 # Other dependencies
 codec = { package = "parity-scale-codec", version = "2.0.0", features = [ "derive" ] }
 futures = { version = "0.3.1", features = ["compat"] }
-parking_lot = "0.9"
+parking_lot = "0.10.2"
 tracing = "0.1.25"
 
 [dev-dependencies]

client/consensus/aura/Cargo.toml

@@ -35,4 +35,4 @@ futures = { version = "0.3.8", features = ["compat"] }
 codec = { package = "parity-scale-codec", version = "2.0.0", features = [ "derive" ] }
 tracing = "0.1.22"
 async-trait = "0.1.42"
-parking_lot = "0.9"
+parking_lot = "0.10.2"

client/consensus/common/Cargo.toml

@@ -24,7 +24,6 @@ polkadot-runtime = { git = "https://github.com/paritytech/polkadot", branch = "m
 
 # Other deps
 futures = { version = "0.3.8", features = ["compat"] }
-tokio = "0.1.22"
 codec = { package = "parity-scale-codec", version = "2.0.0", features = [ "derive" ] }
 tracing = "0.1.25"
 async-trait = "0.1.42"
@@ -33,10 +32,19 @@ dyn-clone = "1.0.4"
 [dev-dependencies]
 # Substrate deps
 sp-tracing = { git = "https://github.com/paritytech/substrate", branch = "master" }
+substrate-test-utils = { git = "https://github.com/paritytech/substrate", branch = "master" }
+sc-service = { git = "https://github.com/paritytech/substrate", branch = "master" }
+sc-cli = { git = "https://github.com/paritytech/substrate", branch = "master" }
 
 # Cumulus dependencies
 cumulus-test-runtime = { path = "../../../test/runtime" }
 cumulus-test-client = { path = "../../../test/client" }
+cumulus-test-service = { path = "../../../test/service" }
+cumulus-primitives-core = { path = "../../../primitives/core" }
+
+# Polkadot deps
+polkadot-test-client = { git = "https://github.com/paritytech/polkadot", branch = "master" }
 
 # Other deps
+tokio = { version = "0.2.21", features = ["macros"] }
 futures-timer = "3.0.2"