Author: Andrew Nicols
MDL-52051 repository_dropbox: Migrate to v2 API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=066963cd183df684303f626061004c13124e2fe3
http://github.com/moodle/moodle/commit/066963cd183df684303f626061004c13124e2fe3
+ 3.2 en [oauth2redirecturi,repository_dropbox]