Fix jlink image warnings #866

Job	Run time
copyright	3m 13s
shellcheck	3m 7s
checkstyle	3m 30s
build	5m 15s
spotbugs	5m 45s
vscode-ext	3m 52s
tests/cli-functional-linux	6m 9s
tests/cli-linux	3m 56s
tests/archetype-linux	5m 10s
javadoc	4m 11s
tests/linker-linux	5m 20s
tests/cli-windows	4m 23s
tests/cli-functional-windows	6m 10s
tests/archetype-windows	5m 58s
tests/others-windows	6m 15s
tests/linker-windows	5m 51s
tests/others-linux	6m 5s
cli/windows-amd64	8s
cli/darwin-amd64	10s
cli/linux-amd64	6s
cli/binaries	0s
tests/results	0s
gate	0s
	1h 24m 34s

Provide feedback