Command we use is:

mvn clean verify -DjbossHome.node1=node1 -DjbossHome.node2=node2 -DuseBuiltinModules -DbuiltinVersion=$HIBERNATE_SEARCH_VERSION -Dmaven.test.failure.ignore

In older versions it was possible to run tests with useBuiltinModules with default bundled version of Hibernate Search or without useBuiltinModules to let maven copy modules with current version to external WildFly. Patching existing distribution is currently a bit harder with wildfly-server-provisioning-maven-plugin used for WildFly preparation and I don't really need it. I prepared fix for a master that fixes it only with original WildFly distribution (command above). If you agree it's enough I'll submit PR and start working on backport to 5.10.

https://github.com/simkam/hibernate-search/commit/535bb2c4b014b3adfa667cc0432f1d1c7640db50 for master.