MDL-41843 Uses OAuthException in moodle\mod\lti namespace
MDL-41843 IMS-LTI: Fixed exception namespace
MDL-37181 backup: stopped setting the status of unscheduled backups to skipped
MDL-41672 Add html2text unit test for multiple occurrences of the same URL
MDL-41672 Fix html2text processing of multiple occurrences of the same URL
MDL-42167 Update workshop assessment record only when really changed

Under certain conditions there is nothing to actually update here. The
$DB->update_record() would throw an exception here.
weekly release 2.5.2+
Merge branch 'MDL-37181_m25' of https://github.com/markn86/moodle into MOODLE_25_STABLE
Merge branch 'wip-mdl-41843-m25' of git://github.com/rajeshtaneja/moodle into MOODLE_25_STABLE
Merge branch 'MDL-42167-workshop-update-record_25' of git://github.com/mudrd8mz/moodle into MOODLE_25_STABLE
Merge branch 'MDL-41672-text-mail-links_25' of git://github.com/mudrd8mz/moodle into MOODLE_25_STABLE
MDL-41170: Added user updated event triggers to password updating functions.
MDL-41170 events: Update upgrade.txt to reflect changes made in MDL-41170