This was supposed to be my triumphant return to Carnival after almost 2 1/2 years away and several false starts. This would prove to be another false start, but I'm getting ahead of the story.   I booked this cruise back in March, when I saw an exceptional price on an OV cabin. I watched the days count by, including protocols being modified several times, until the day was close.   I did the Abbott proctored test thing for the fifth time. And for the fifth time my proctor and