message: [cluster-test] Fix metrics for multi-region-simulation
  Closes:
  Approved by: andll
diff: @@ -109,7 +109,7 @@ impl MultiRegionSimulation {
  metrics.txn_per_sec = self
  .prometheus
  .query_range_avg(
  - "irate(consensus_gauge{op='last_committed_version'}[1m])".to_string(),
  + "irate(libra_consensus_last_committed_version[1m])".to_string(),
  &start,
  &end,
  step,
  @@ -119,7 +119,7 @@ impl MultiRegionSimulation {
  metrics.blocks_per_sec = self
  .prometheus
  .query_range_avg(
  - "irate(consensus_gauge{op='last_committed_round'}[1m])".to_string(),
  + "irate(libra_consensus_last_committed_round[1m])".to_string(),
  &start,
  &end,
  step,
  @@ -129,7 +129,7 @@ impl MultiRegionSimulation {
  metrics.avg_vote_time = self
  .prometheus
  .query_range_avg(
  - "irate(consensus_duration_sum{op='creation_to_receival_s'}[1m])/irate(consensus_duration_count{op='creation_to_receival_s'}[1m])".to_string(),
  + "irate(libra_consensus_creation_to_receival_s_sum[1m])/irate(libra_consensus_creation_to_receival_s_count[1m])".to_string(),
  &start,
  &end,
  step,
  @@ -139,7 +139,7 @@ impl MultiRegionSimulation {
  metrics.avg_qc_time = self
  .prometheus
  .query_range_avg(
  - "irate(consensus_duration_sum{op='creation_to_qc_s'}[1m])/irate(consensus_duration_count{op='creation_to_qc_s'}[1m])".to_string(),
  + "irate(libra_consensus_creation_to_qc_s_sum[1m])/irate(libra_consensus_creation_to_qc_s_count[1m])".to_string(),
  &start,
  &end,
  step,
  