Add more metrics to prometheus (#5034)

* Add a few things

* Add finality_grandpa_round

* fix fg tests

* Nitpicks

* Nitpicks

* Fix name of prometheus crate

substrate/client/finality-grandpa/src/tests.rs

@@ -447,6 +447,7 @@ fn run_to_completion_with<F>(
 			on_exit: Exit,
 			telemetry_on_connect: None,
 			voting_rule: (),
+			prometheus_registry: None,
 		};
 		let voter = run_grandpa_voter(grandpa_params).expect("all in order with client and network");
 
@@ -578,6 +579,7 @@ fn finalize_3_voters_1_full_observer() {
 			on_exit: Exit,
 			telemetry_on_connect: None,
 			voting_rule: (),
+			prometheus_registry: None,
 		};
 
 		voters.push(run_grandpa_voter(grandpa_params).expect("all in order with client and network"));
@@ -741,6 +743,7 @@ fn transition_3_voters_twice_1_full_observer() {
 			on_exit: Exit,
 			telemetry_on_connect: None,
 			voting_rule: (),
+			prometheus_registry: None,
 		};
 		let voter = run_grandpa_voter(grandpa_params).expect("all in order with client and network");
 
@@ -1166,6 +1169,7 @@ fn voter_persists_its_votes() {
 							on_exit: Exit,
 							telemetry_on_connect: None,
 							voting_rule: VotingRulesBuilder::default().build(),
+							prometheus_registry: None,
 						};
 
 						let voter = run_grandpa_voter(grandpa_params)
@@ -1511,6 +1515,7 @@ fn voter_catches_up_to_latest_round_when_behind() {
 			on_exit: Exit,
 			telemetry_on_connect: None,
 			voting_rule: (),
+			prometheus_registry: None,
 		};
 
 		Box::pin(run_grandpa_voter(grandpa_params).expect("all in order with client and network"))
@@ -1642,6 +1647,7 @@ fn grandpa_environment_respects_voting_rules() {
 			voters: Arc::new(authority_set.current_authorities()),
 			network,
 			voting_rule,
+			metrics: None,
 			_phantom: PhantomData,
 		}
 	};