use JTableDriver in ene-to-end test
use JTable for displaying sniper status
change sniperWinsAnAuctionByBiddingHigher to check row data instead of
status
add SniperState
use SniperState in unittest bidsHigherAndReportsBiddingWhenNewPriceArrives
pass bidsHigherAndReportsBiddingWhenNewPriceArrives again