test: move common logic into TestBase #473

Job	Run time
Lint commits for semantic-release	13s
Lint commits for semantic-release	13s
Lint commits for semantic-release	11s
Check editorconfig	8s
Check editorconfig	8s
Check editorconfig	5s
Dry-run release	15s
Dry-run release	15s
Dry-run release	14s
Build and Test Java	49s
Build and Test Java	1m 25s
Build and Test Java	47s
Security validation	3s
Security validation	3s
Security validation	5s
Build Isthmus Native Image	0s
Build Isthmus Native Image	0s
Build Isthmus Native Image	0s
	4m 54s

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