ISPN-4012 Mark mass indexing tests as unstable
Temporarily disable REST security integration tests until  ISPN-4407
ISPN-4412 Fix failing embedded security integration tests
ISPN-4415 Provide correct Managed executor facade and fix XSLT

* Correct executor thread factories needed to be provided according
to the executor being plugged. Scheduled ones need a different facade.
* Fix an XSLT issue so that custom Hot Rod endpoints are added
correctly.
ISPN-4405 Remove unnecessary Lucene dependencies causing build halt
ISPN-4406 Security integration tests should run sequentially

* This is because tests rely on static field initialisation.
* To support this, test cache manager factory must be able to cope with
checking if the cache is closed even if it's unauthorised.