NEW ORLEANS (AP) — Carnival Cruise Line plans to swap ships between Galveston and New Orleans to increase both ports’ capacity for short-term cruises starting in 2019. The Miami-based company says the 3,646-passenger Carnival Dream will move from New Orleans to Galveston, increasing the Texas port’s capacity for 4- and 5-day cruises by 22 percent. At the same time, the …