Moodle Plugin CI

Address a few more minor comments reported by CI #19

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Run time

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Job	Run time
test (7.4, MOODLE_311_STABLE, pgsql)	4m 57s
test (7.4, MOODLE_400_STABLE, pgsql)	5m 12s
test (7.4, MOODLE_401_STABLE, pgsql)	5m 29s
test (8.0, MOODLE_311_STABLE, pgsql)	4m 44s
test (8.0, MOODLE_400_STABLE, pgsql)	5m 8s
test (8.0, MOODLE_401_STABLE, pgsql)	5m 29s
test (8.0, MOODLE_402_STABLE, pgsql)	5m 9s
test (8.0, MOODLE_403_STABLE, pgsql)	5m 20s
test (8.1, MOODLE_401_STABLE, pgsql)	5m 30s
test (8.1, MOODLE_402_STABLE, pgsql)	5m 29s
test (8.1, MOODLE_403_STABLE, pgsql)	5m 16s
test (8.1, MOODLE_404_STABLE, pgsql)	5m 20s
test (8.2, MOODLE_402_STABLE, pgsql)	5m 0s
test (8.2, MOODLE_403_STABLE, pgsql)	5m 33s
test (8.2, MOODLE_404_STABLE, pgsql)	5m 35s
test (8.3, MOODLE_404_STABLE, pgsql)	5m 6s
test (MOODLE_404_STABLE, mariadb, 8.3)	4m 53s
	1h 29m 10s