By Natalia Baage November 10, 2009After asking for his fight to be fixed, rapper DMX has been replaced.  Coolio, another rapper, who grew to fame in the '90s, has taken DMX's place, and will now face Eric Martinez on Dec. 12. On Saturday, TMZ reported that DMX's manager had filed an addendum, saying that he would be the winner of the fight against Martinez. Thunder Promotions, the event's promotion company, told TMZ that Coolio has signed the contract, has bee...