Fix unit tests in auth_plugin_test.php #58

Job	Run time
ci / check if job needs to run	3s
ci / prepare test matrix	21s
ci / MOODLE_310_STABLE - pgsql - php 7.2 - auth_userkey	3m 22s
ci / MOODLE_33_STABLE - mariadb - php 7.1 - auth_userkey	4m 5s
ci / MOODLE_311_STABLE - mariadb - php 7.3 - auth_userkey	3m 5s
ci / MOODLE_34_STABLE - pgsql - php 7.1 - auth_userkey	2m 39s
ci / MOODLE_35_STABLE - mariadb - php 7.1 - auth_userkey	2m 56s
ci / MOODLE_35_STABLE - pgsql - php 7.1 - auth_userkey	2m 32s
ci / MOODLE_35_STABLE - mariadb - php 7.2 - auth_userkey	2m 56s
ci / MOODLE_35_STABLE - pgsql - php 7.2 - auth_userkey	2m 31s
ci / MOODLE_36_STABLE - mariadb - php 7.1 - auth_userkey	3m 3s
ci / MOODLE_37_STABLE - pgsql - php 7.2 - auth_userkey	2m 54s
ci / MOODLE_38_STABLE - mariadb - php 7.3 - auth_userkey	3m 36s
ci / MOODLE_39_STABLE - mariadb - php 7.2 - auth_userkey	3m 21s
ci / MOODLE_39_STABLE - pgsql - php 7.2 - auth_userkey	3m 3s
ci / MOODLE_400_STABLE - pgsql - php 7.3 - auth_userkey	3m 43s
ci / MOODLE_39_STABLE - pgsql - php 7.3 - auth_userkey	3m 17s
ci / MOODLE_39_STABLE - mariadb - php 7.3 - auth_userkey	3m 4s
ci / MOODLE_401_STABLE - pgsql - php 7.4 - auth_userkey	3m 19s
ci / MOODLE_401_STABLE - mariadb - php 7.4 - auth_userkey	3m 7s
ci / MOODLE_401_STABLE - pgsql - php 8.0 - auth_userkey	3m 20s
ci / MOODLE_401_STABLE - mariadb - php 8.0 - auth_userkey	3m 20s
ci / Release to the Moodle plugin directory	0s
	1h 3m 37s

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