Carnival Service provider – riding a wave of bad publicity after a fireplace on the cruise ship Triumph left passengers eating onion sandwiches and dodging sewage – announced Wednesday that it will spend as much as $seven-hundred million to upgrade its fleet of one hundred and one ships.About 1/2 of that sum – greater than $300 million – will go toward boosting emergency power and improving the reliability of the 24 ships operated by way of …