Author: Frederic Massart
MDL-36456 repository: S3 handles errors in a nicer way
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1fefd1ff8db6320e9353bb56830500253921ed85
http://github.com/moodle/moodle/commit/1fefd1ff8db6320e9353bb56830500253921ed85
+ 2.5 en [errorwhilecommunicatingwith,core_repository]