By Leika Kihara TOKYO (Reuters) - The Bank of Japan is set on Friday to project that it will meet its 2 percent inflation target in two years, a forecast analysts say may be too optimistic and could put the bank's credibility on the line. The central bank, charged with overturning years of dogged deflation, is not expected to come up with any fresh policy initiatives after new Governor Haruhiko Kuroda stunned markets on April 4 by promising to inject about $1.4 trillion into the economy to hit the inflation target in roughly two years. ...