Include a reference to the validation data in the candidate descriptor (#1442)

* rename GlobalValidationSchedule to GlobalValidationData

* guide: update candidate descriptor to contain validation data hash

* guide: add note in inclusion module about checking validation data hash

* primitives: update CandidateDescriptor to contain new hash

* fix payload computation

* add helpers for computing validation data to runtime modules

* guide: note routines

* inclusion: check validation data hash and fix local_validation_data bug

* add a case to candidate_checks and improve that test substantially

* bump versions

* address review comments

* add a test for including code upgrade

* bump kusama version

* bump westend & polkadot versions

polkadot/parachain/test-parachains/adder/collator/src/main.rs

@@ -24,7 +24,7 @@ use sp_core::Pair;
 use codec::{Encode, Decode};
 use primitives::v0::{
 	Hash, DownwardMessage,
-	HeadData, BlockData, Id as ParaId, LocalValidationData, GlobalValidationSchedule,
+	HeadData, BlockData, Id as ParaId, LocalValidationData, GlobalValidationData,
 };
 use collator::{ParachainContext, Network, BuildParachainContext, Cli, SubstrateCli};
 use parking_lot::Mutex;
@@ -58,7 +58,7 @@ impl ParachainContext for AdderContext {
 	fn produce_candidate(
 		&mut self,
 		_relay_parent: Hash,
-		_global_validation: GlobalValidationSchedule,
+		_global_validation: GlobalValidationData,
 		local_validation: LocalValidationData,
 		_: Vec<DownwardMessage>,
 	) -> Self::ProduceCandidate