The renewal of a five-year program of tuition increases and investment in the State University of New York system is in doubt amid questions about increasing financial burdens on students and whether its goals have been achieved.  SUNY 2020 was intended to provide funding for capital projects, and Governor Andrew Cuomo and other supporters said it would give parents and students more certainty about expenses, with the system's trustees having the option to increase tuition up to $300 in each of the first five years.  But lawmakers are balking after SUNY tuition grew by at least three times the rate of inflation every year since 2011.  Cuomo said after a round of budget negotiations Tuesday that the extension isn't likely to get through the Legislature.