There are two tests failing when running on Java 11 related with javadoc-plugin:
These failures are related to
JENKINS-32619 because Java11 is not using frames anymore for rendering the javadoc.
javadoc-plugin has been fixed to modify the landing page when linking the javadoc, but we still need to fix the tests of this plugin on ATH.
Depending on the java version and the javadoc-plugin version used, the way of asserting the javadoc is generated is different.