Author: David Woloszyn
MDL-82347 hub: Registration collects plugin usage data
http://git.moodle.org/gw?p=moodle.git;a=commit;h=12b43ec6c4da12dfd4f201de0983f07e1313ca0e
http://github.com/moodle/moodle/commit/12b43ec6c4da12dfd4f201de0983f07e1313ca0e
+ 4.5 en [pluginusagedata,core_hub]