Fix fee mismatch on snapshot deserialize

Author: carllin

runtime/src/bank.rs

@@ -878,7 +878,11 @@ impl Bank {
         );
         assert_eq!(bank.epoch_schedule, genesis_config.epoch_schedule);
         assert_eq!(bank.epoch, bank.epoch_schedule.get_epoch(bank.slot));
-
+        bank.fee_rate_governor.lamports_per_signature = bank.fee_calculator.lamports_per_signature;
+        assert_eq!(
+            bank.fee_rate_governor.create_fee_calculator(),
+            bank.fee_calculator
+        );
         bank
     }
 

sdk/src/fee_calculator.rs

@@ -68,7 +68,7 @@ pub struct FeeRateGovernor {
     // The current cost of a signature  This amount may increase/decrease over time based on
     // cluster processing load.
     #[serde(skip)]
-    lamports_per_signature: u64,
+    pub lamports_per_signature: u64,
 
     // The target cost of a signature when the cluster is operating around target_signatures_per_slot
     // signatures