KINGSTON, Jamaica — The U.S. Virgin Islands’ environmental agency plans to file a violation order against two rum producers on St. Croix as residents of several communities complain of a black mold persistently staining their properties, cars and boats.Jamal Nielsen, spokesman for the Department of Planning and Natural Resources, said authorities are “in the process of crafting a violation order” against Cruzan Rum and Diageo USVI, a subsidiary of global liquor giant Diageo PLC that produces the rum for the Captain Morgan …