HSEARCH-1278 Spodaric test failure: org.hibernate.search.test.batchindex...

...ing.MassIndexerErrorReportingTest

I _think_ this might solve the occasional test failure, but since I can't reproduce it locally I'd have CI run it several times before merging.

For sure it's a needed cleanup, as we had an ugly workaround in place to compensate for a long solved limitation in Byteman.