Git commits in Moodle 3.2.1 by Ilya Tregubov

commit 9e99327888423410c20a6e088fcb392e5aef1d4e
Author: Ilya Tregubov <ilya@catalyst-au.net>
Date:   Tue, 06 Dec 2016 11:35:00 +0800
Tag:    v3.2.1

MDL-55906 table: Update user preferences table when reset preferences