ci fixing #16

Job	Run time
CI test (make validate)	1m 7s
Code coverage (codecov)	0s
Build moodle-plugin-ci.phar	31s
Integration tests (8.3, main, true)	1m 27s
Integration tests (8.3, MOODLE_404_STABLE, true)	1m 15s
Integration tests (8.2, MOODLE_403_STABLE, true)	1m 23s
Integration tests (8.2, MOODLE_402_STABLE, true)	1m 26s
Integration tests (8.1, MOODLE_401_STABLE, true)	1m 28s
Integration tests (8.0, MOODLE_400_STABLE)	1m 10s
Integration tests (8.0, MOODLE_311_STABLE)	1m 14s
Integration tests (7.4, MOODLE_39_STABLE)	1m 41s
SelfUpdate tests (PHAR) (8.3)	1m 1s
Integration tests (PHAR) (8.3, main, true)	1m 19s
SelfUpdate tests (PHAR) (8.2)	35s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	1m 21s
SelfUpdate tests (PHAR) (8.1)	20s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	1m 20s
SelfUpdate tests (PHAR) (8.0)	30s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	1m 3s
SelfUpdate tests (PHAR) (7.4)	28s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	1m 8s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	56s
	22m 43s

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