An upgrade to Ubuntu 18.04 forces java to openjdk 11 (the LTS, and 10.04
is an LTS as well).
Except it's not really Java 11! , which isn't due out until September,
it's java 10.0.1.
Surefire needs updating to 2.21.0 otherwise there is an NPE.
So, I've update the dependency in the top POM and there is a Jenkins job
to build (java8 classfile) with a JDK10 (ASF Jenkins is a bit iffy at he
moment - the jobfailures
One less mystery.
The javadoc production is more sensitive to correct HTML which impacts
jena-iri (errors) and others (many warnings).
Andy
