MDL-47975 assign: Stop gap fix for random time fails.
MDL-30968 mod/forum Fixed group link
MDL-47502 test_statslib_cron_daily: fix provider

Fiddling with the database in the data provider causes "out of sync"
errors when running suite tests.
MDL-47391 Update pagelayout for default profile configuration for MOODLE_27_STABLE
MDL-39692 grade: Ability to delete letter boundary
MDL-39692 grade: Little code clean up of letter boundary deletion
MDL-39376 enrol: Optimized setting for ldap and database
MDL-48093 HTML 5 video: Firefox now supports .mp4
Merge branch 'MDL-48093-m27' of https://github.com/sammarshallou/moodle into MOODLE_27_STABLE
Merge branch 'MDL-47975-27' of git://github.com/damyon/moodle into MOODLE_27_STABLE
Merge branch 'MDL-47502' of https://github.com/eugeneventer/moodle-fixes into MOODLE_27_STABLE
MDL-47502 statslib tests: improve test

While integrating I noticed some problems which already existed in this
test:
* The enrolment data generator was not used
* The student roleid was hardocded
* The role assignment was at site level..
Merge branch 'MDL-30968-m27-forum-group-link' of https://github.com/amandadoughty/moodle into MOODLE_27_STABLE
Merge branch 'MDL-39692-27' of git://github.com/FMCorz/moodle into MOODLE_27_STABLE
Merge branch 'MDL-47391_M27' of github.com:ninelanterns/moodle into MOODLE_27_STABLE
MDL-30968 mod_forum: No picture link to group when no groups mode
weekly release 2.7.3+
MDL-29585 mod_wiki: Handle special characters in headings/sections