java-idp-jetty-base: persistTempDirectory in idp.xml for Jetty 12

[Cantor, Scott]

> (For what it's worth, adding it doesn't seem to have any
> effect, the directories still don't get cleaned up.)

I was about to say that the setting was removed because I think it crashed Jetty but sounds like I'm thinking of a different one.

We are not Jetty, needless to say, and if it has a bug, you'd have to report it to them.

It could also be there's a different property that has to be set if they renamed it.

I am not on 12 yet so I have no experience to say.

-- Scott