Running the performance tests gets the filesystem dirty:

integrationtest/performance/ProductArticle/
integrationtest/performance/org.hibernate.search.test.event.autoindexembeddable.Book/
integrationtest/performance/org.hibernate.search.test.jpa.Bretzel/
integrationtest/performance/org.hibernate.search.test.jpa.ToStringTest$Foo/
integrationtest/performance/org.hibernate.search.test.query.timeout.Clock/
integrationtest/performance/org.hibernate.search.test.spatial.POI/

Rather than debugging again the complex auto-detection for the right paths which need to be cleaned up, I think we should refactor this module to take an explicit "temp dir" property, which Maven could inject as a property.

We'll then make sure that path is wiped clean.

In addition it would make it easier to test on different target filesystems, as I usually don't want to run the benchmark on my source code mount point.