Add spotlesscheck to build.gradle and CI #632

Job	Run time
build (cfi-tests, 8)	9m 9s
build (cfi-tests, 11)	11m 49s
build (cfi-tests, 17)	10m 41s
build (downstream-ontology, 8)	8m 43s
build (downstream-ontology, 11)	12m 3s
build (downstream-ontology, 17)	11m 18s
build (downstream-security-demo, 8)	8m 27s
build (downstream-security-demo, 11)	11m 14s
build (downstream-security-demo, 17)	11m 45s
build (downstream-universe, 8)	5m 26s
build (downstream-universe, 11)	9m 45s
build (downstream-universe, 17)	9m 20s
	1h 59m 40s

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