By THÉRÈSE MARGOLIS After the resounding success of its walk-through “Haunted Halloween” adventure in October and November, Encuentro Oceanía shopping mall’s Ping Poing adventure company has brushed off the dust and cobwebs of its scariest Day-of-the-Dead paraphernalia and given it a “second life” with a revamped interpretation of sinister Christmas tales. The newly opened, 10-minute “Christmas Horror Story” experience mixes