Jim Lovell, commander of the fateful Apollo 13 lunar mission, sat four rows in front of a reporter on the opening night of Ron Howard’s “Apollo 13” at Navy Pier.Although Lovell was right there in front, the reporter was on edge the entire screening, wondering how the astronauts would ever make it back to earth.“The Post,” Steven Spielberg’s new film about the risky, defiant publication of the Pentagon Papers by the Washington Post, is similarly suspenseful. Even before the lights go dim …