Update fixture with data from the server
Update fixture with data from the server

Among other things, all exercises now have a creation date. For whatever reason,
some of them had null values here.

wger-project/wger,wger-project/wger,rolandgeider/wger,rolandgeider/wger,wger-project/wger,petervanderdoes/wger,wger-project/wger,rolandgeider/wger,petervanderdoes/wger,rolandgeider/wger,petervanderdoes/wger,petervanderdoes/wger