Use Vote Ancestries Directly in Weight Calculations (#862)

* Use more accurate weight calculation in declared weight

* Remove session length and validator set size config constants

* Remove config params from mock

* Allow specifying total number of votes-ancestries per justification

* Change limits used during benchmarking

* Regenerate weights

* Use simplified weight annotation

* Remove comment

* Address leftover TODO

* Prevent possible divide by zero errors

* Use correct argument order in weight declaration

bridges/modules/grandpa/src/mock.rs

@@ -87,8 +87,6 @@ parameter_types! {
 impl grandpa::Config for TestRuntime {
 	type BridgedChain = TestBridgedChain;
 	type MaxRequests = MaxRequests;
-	type MaxBridgedSessionLength = SessionLength;
-	type MaxBridgedValidatorCount = NumValidators;
 	type WeightInfo = ();
 }