fix: upgrade logic for old (authoring tool 2.1.7) courses uploaded vi… #306

Job	Run time
define-matrix	2s
test (8.3, main, pgsql, true)	1m 16s
test (8.3, main, mariadb, true)	3m 29s
test (8.1, MOODLE_404_STABLE, pgsql, false)	3m 29s
test (8.1, MOODLE_404_STABLE, mariadb, false)	3m 27s
test (8.2, MOODLE_404_STABLE, pgsql, false)	3m 27s
test (8.2, MOODLE_404_STABLE, mariadb, false)	3m 28s
test (8.3, MOODLE_404_STABLE, pgsql, false)	3m 24s
test (8.3, MOODLE_404_STABLE, mariadb, false)	3m 28s
test (8.1, MOODLE_405_STABLE, pgsql, false)	3m 37s
test (8.1, MOODLE_405_STABLE, mariadb, false)	3m 34s
test (8.2, MOODLE_405_STABLE, pgsql, false)	3m 35s
test (8.2, MOODLE_405_STABLE, mariadb, false)	3m 27s
test (8.3, MOODLE_405_STABLE, pgsql, false)	3m 29s
test (8.3, MOODLE_405_STABLE, mariadb, false)	3m 30s
	46m 42s

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