Done, Elephas has an override for surefire (see other email).
The build-java9 job has been re-activated and set to run once a day.
It runs "mvn clean verify -Pdev" (no javadoc).
Elsewhere, the normal development build test is unhappy about javadoc in
jena-iri (no source changes). But it is fine on my machine - same
javadoc-plugin (different java8). There may be some noise of failing
jobs while I try different versions.
[ERROR]
/home/jenkins/jenkins-slave/workspace/Jena_Development_Test/jena-iri/src/main/java/org/apache/jena/iri/IRIFactory.java:559:
warning: no @return
[ERROR] public boolean isError(int code) {
[ERROR] ^
which is accurate but doclint is "none".
I don't fancy fixing up all javadoc to get it through java8!
Andy