By Anna Yukhananov and Kim Dixon WASHINGTON (Reuters) - Treasury Secretary Jack Lew and Republican lawmakers sang the same tune on Thursday on Capitol Hill about the need to revamp the corporate and individual tax codes simultaneously, but there was no harmony on how to get there. The Republicans and Lew - named by President Barack Obama in January as his new economic policy chief - sharply disagreed on raising new revenues through the tax code, a major impediment to comprehensive tax reform. ...