US Cash Products-Refinery fire boosts Harbor product markets

* Harbor prompt gasoline, diesel up on brief refinery fire * Chicago products up as government data shows refinery work * Gulf gasoline retreats after pipeline scheduling HOUSTON, May 9 (Reuters) - A brief early-morning fire at the largest refinery on the U.S. East Coast gave New York Harbor prompt cash refined products markets a jolt on Wednesday, traders said. The fire ignited in a crude distillation unit in the Girard Point section of the 335,000 barrel-per-day Sunoco Inc Ph