By RICARDO CASTILLO     Six years ago, then-recently instated Mexican President Enrique Peña Nieto had a double honeymoon. One, of course, was as president, and the other was with his newly acquired sweetheart, soap opera star, Angelica Rivera, famous back then for her role in telenovela “Distilling Love.” Rivera played the role of a well-pedicured ,barefoot farm girl with big, false