CandidateBackingSubsystem (#1312)

* Updates guide for CandidateBacking

* Move assignment types to primitives

* Initial implementation.

* More functionality

* use assert_matches

* Changes to report misbehaviors

* Some fixes after a review

* Remove a blank line

* Update guide and some types

* Adds run_job function

* Some comments and refactorings

* Fix review

* Remove warnings

* Use summary in kicking off validation

* Parallelize requests

* Validation provides local and global validation params

* Test issued validity tracking

* Nits from review

polkadot/runtime/parachains/src/inclusion.rs

@@ -25,7 +25,7 @@ use primitives::{
 	parachain::{
 		ValidatorId, AbridgedCandidateReceipt, ValidatorIndex, Id as ParaId,
 		AvailabilityBitfield as AvailabilityBitfield, SignedAvailabilityBitfields, SigningContext,
-		BackedCandidate,
+		BackedCandidate, CoreIndex, GroupIndex, CoreAssignment,
 	},
 };
 use frame_support::{
@@ -38,7 +38,7 @@ use bitvec::{order::Lsb0 as BitOrderLsb0, vec::BitVec};
 use sp_staking::SessionIndex;
 use sp_runtime::{DispatchError, traits::{One, Saturating}};
 
-use crate::{configuration, paras, scheduler::{CoreIndex, GroupIndex, CoreAssignment}};
+use crate::{configuration, paras};
 
 /// A bitfield signed by a validator indicating that it is keeping its piece of the erasure-coding
 /// for any backed candidates referred to by a `1` bit available.
@@ -498,7 +498,7 @@ mod tests {
 	use primitives::{BlockNumber, Hash};
 	use primitives::parachain::{
 		SignedAvailabilityBitfield, CompactStatement as Statement, ValidityAttestation, CollatorId,
-		CandidateCommitments, SignedStatement,
+		CandidateCommitments, SignedStatement, AssignmentKind,
 	};
 	use frame_support::traits::{OnFinalize, OnInitialize};
 	use keyring::Sr25519Keyring;
@@ -510,7 +510,6 @@ mod tests {
 	use crate::initializer::SessionChangeNotification;
 	use crate::configuration::HostConfiguration;
 	use crate::paras::ParaGenesisArgs;
-	use crate::scheduler::AssignmentKind;
 
 	fn default_config() -> HostConfiguration<BlockNumber> {
 		let mut config = HostConfiguration::default();