Change method name in Carrierwave uploader
Change method name in Carrierwave uploader

- This is caused by a breaking change in carrierwaveuploader/carrierwave#1819

Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2