TOKYO (Reuters) -The Bank of Japan will pull the plug on its eight-year negative interest rate policy in April, according to more than 80% of economists polled by Reuters, marking a long-awaited major shift from a global outlier central bank. Nearly the same proportion of economists, 76%, also expect the BOJ to scrap yield curve control at that meeting, with almost all saying ultra-loose monetary conditions will end then, just months before many major central banks are expected to start cutting rates. The BOJ is on track to end negative interest rates in coming months despite Japan's ec...