Wrap discussion creation into db transaction (#276) #1357

Job	Run time
call / setup_jobs	4s
call / sync_pull_request_template	5s
call / static (8.3, MOODLE_501_STABLE, pgsql)	1m 44s
call / test (8.3, MOODLE_405_STABLE, pgsql)	8m 9s
call / test (8.4, MOODLE_500_STABLE, pgsql)	8m 15s
call / test (8.2, MOODLE_501_STABLE, pgsql)	8m 37s
call / test (8.2, MOODLE_500_STABLE, pgsql)	8m 14s
call / test (8.2, MOODLE_501_STABLE, mysqli)	8m 37s
call / test (8.3, MOODLE_501_STABLE, pgsql)	8m 20s
call / test (8.2, MOODLE_405_STABLE, pgsql)	8m 6s
call / test (8.3, MOODLE_501_STABLE, mariadb)	7m 28s
call / test (8.3, MOODLE_501_STABLE, mysqli)	8m 45s
call / test (8.4, MOODLE_501_STABLE, mysqli)	9m 3s
call / test (8.4, MOODLE_501_STABLE, pgsql)	7m 38s
call / test (8.2, MOODLE_501_STABLE, mariadb)	8m 2s
call / test (8.4, MOODLE_501_STABLE, mariadb)	8m 22s
call / test (8.3, MOODLE_500_STABLE, pgsql)	8m 11s
call / test (8.1, MOODLE_405_STABLE, pgsql)	7m 57s
call / test (8.3, MOODLE_502_STABLE, pgsql)	8m 29s
call / test (8.3, MOODLE_502_STABLE, mariadb)	8m 45s
call / test (8.4, MOODLE_502_STABLE, pgsql)	8m 40s
call / test (8.4, MOODLE_502_STABLE, mariadb)	8m 40s
call / test (8.3, MOODLE_502_STABLE, mysqli)	9m 1s
call / test (8.4, MOODLE_502_STABLE, mysqli)	9m 53s
	2h 59m 5s

Provide feedback