Thousands of Mexico soccer fans gathered Saturday at the Coliseum, donning the green, white and red colors of the Mexican flag to celebrate the national team as it played against Japan before a sold-out crowd of more than 45,000 people.  The sound of trumpets, wooden rattles, and the ringing bells of paleteros, or street vendors, filled the parking lot as fans tailgated before the game. They grilled meat, shared tacos and displayed the Mexican flag on their cars. Grills were…