Remove +1 in DefaultSlotSetBidSlotNum

The smart contracts were updated at some point and there have been some changes
in slot calculation.  Update these values in the synchronizer and test auction
smart contract implementaiton.

synchronizer/synchronizer.go

@@ -1080,7 +1080,7 @@ func (s *Synchronizer) auctionSync(ethBlock *common.Block) (*common.AuctionData,
 		}
 		s.vars.Auction.DefaultSlotSetBid[evt.SlotSet] = evt.NewInitialMinBid
 		s.vars.Auction.DefaultSlotSetBidSlotNum = s.consts.Auction.SlotNum(blockNum) +
-			int64(s.vars.Auction.ClosedAuctionSlots) + 1
+			int64(s.vars.Auction.ClosedAuctionSlots)
 		varsUpdate = true
 	}
 

test/ethclient.go

@@ -1429,11 +1429,11 @@ func (c *Client) AuctionBid(amount *big.Int, slot int64, bidAmount *big.Int,
 	nextBlock := c.nextBlock()
 	a := nextBlock.Auction
 
-	if slot < a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots) {
+	if slot <= a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots) {
 		return nil, tracerr.Wrap(errBidClosed)
 	}
 
-	if slot >= a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots)+int64(a.Vars.OpenAuctionSlots) {
+	if slot > a.getCurrentSlotNumber()+int64(a.Vars.ClosedAuctionSlots)+int64(a.Vars.OpenAuctionSlots) {
 		return nil, tracerr.Wrap(errBidNotOpen)
 	}