Update synchronizer and DB with last contracts updates

- API
	- When updating network info, handle cases where no batches exists and
	  where no forgers exists
- cli/node
	- Update `cfg.buidler.toml` config file to a working version
- common
	- Add new smart contract structs and extend some existing ones to
	  reflect updates regarding events from the smart contracts
- SQL
	- Add new tables and extend existing ones to reflect updates regarding
	  events from the smart contracts
- db/historydb
	- Add functions to insert new smart contract events data
	- Fix unclosed rows that led to inconsistent sql driver state (replace
	  NamedQuery by NamedExec).  This fixes the error:
	  `pq: unexpected Parse response 'C'`
- db/l2db
	- Close rows after usage
- eth
	- In Rollup event, introduce a new UpdateBucketsParameter when there's a
	  SafeMode event, with `SafeMode = true`
- synchronizer
	- synchronize new events
	- avoid calling `auction.CanForge` before the genesisBlock to avoid
	  getting a revert.

eth/rollup.go

@@ -131,6 +131,7 @@ type rollupEventUpdateBucketsParametersAux struct {
 type RollupEventUpdateBucketsParameters struct {
 	// ArrayBuckets [common.RollupConstNumBuckets][4]*big.Int
 	ArrayBuckets [common.RollupConstNumBuckets]RollupUpdateBucketsParameters
+	SafeMode     bool
 }
 
 // RollupEventUpdateTokenExchange is an event of the Rollup Smart Contract
@@ -798,6 +799,20 @@ func (c *RollupClient) RollupEventsByBlock(blockNum int64) (*RollupEvents, *ethC
 		case logHermezSafeMode:
 			var safeMode RollupEventSafeMode
 			rollupEvents.SafeMode = append(rollupEvents.SafeMode, safeMode)
+			// Also add an UpdateBucketsParameter with
+			// SafeMode=true to keep the order between `safeMode`
+			// and `UpdateBucketsParameters`
+			bucketsParameters := RollupEventUpdateBucketsParameters{
+				SafeMode: true,
+			}
+			for i := range bucketsParameters.ArrayBuckets {
+				bucketsParameters.ArrayBuckets[i].CeilUSD = big.NewInt(0)
+				bucketsParameters.ArrayBuckets[i].Withdrawals = big.NewInt(0)
+				bucketsParameters.ArrayBuckets[i].BlockWithdrawalRate = big.NewInt(0)
+				bucketsParameters.ArrayBuckets[i].MaxWithdrawals = big.NewInt(0)
+			}
+			rollupEvents.UpdateBucketsParameters = append(rollupEvents.UpdateBucketsParameters,
+				bucketsParameters)
 		}
 	}
 	return &rollupEvents, blockHash, nil