MDL-43628 assign: make submissionagreement usable on multilingual sites
MDL-48194 testing: Adjust naming of testsuites in phpunit.xml

This will make it easier to run phpunit for a specific component by making
all testsuite names consistent, guessable, and in-line with the naming of
the parameter (testsuite vs. test suite).
MDL-48196 phpunit: Set e-mail address for admin user at installation
MDL-44657 forms: Form identifiers should only contain basic characters
MDL-47993 calendar: Fix ical import Microsoft calendar issue
MDL-48171 gradebook: Use proper apis to get item name
MDL-47590 question backup: include response file only with userdata
MDL-48179 Backup progress: Can time out when compressing large backup
Merge branch 'MDL-44657-28' of git://github.com/FMCorz/moodle into MOODLE_28_STABLE
Merge branch 'MDL-47590_28' of git://github.com/timhunt/moodle into MOODLE_28_STABLE
MDL-35638 backup: Do not print headers during redirects
Merge branch 'MDL-43628_v28' of https://github.com/scyrma/moodle into MOODLE_28_STABLE
Merge branch 'm28_MDL-47993' of https://github.com/totara/moodle into MOODLE_28_STABLE
Merge branch 'MDL-48196-28' of git://github.com/andrewnicols/moodle into MOODLE_28_STABLE
Merge branch 'MDL-48179-m28' of https://github.com/sammarshallou/moodle into MOODLE_28_STABLE
Merge branch 'MDL-48171-28' of git://github.com/ankitagarwal/moodle into MOODLE_28_STABLE
Merge branch 'MDL-48194-28' of git://github.com/andrewnicols/moodle into MOODLE_28_STABLE
MDL-43987 core: Remove port numbers in cleanremoteaddr