By RICARDO CASTILLO     Hold the tequila! During the bilateral U.S.-Mexico celebration on Monday, Aug. 27, because the administrations of Donald Trump and Enrique Peña Nieto had come to agreement, Mexico’s Peña Nieto invited The Don to a tequila toast that the U.S. president referred as to the new Mexico-U.S. Trade Agreement. In fact, Mexico’s still greenhorn diplomat, Foreign Relations Secretary Luis