Avoid jaxb-api dependency convergence errors from Hibernate Search ORM

I've seen a case in another branch where the maven enforcer plugin reported a dependency convergence error due to Hibernate Search ORM using a different version of jaxb-api versus other deps. I'm cleaning that up via an exclusion (JBEAP-17851) and if it happened there it might happen some day here. Since WF controls the version of jaxb-api in dependencyManagement might as well harden against this happening by adding the exclude to master too.