ELContextCleaner no longer needed.

[janbartel]

jetty_10

The o.e.j.servlet.listener.ELContextCleaner class is no longer needed, as the class that it attempts to clean up for javax.el.BeanELResolver no longer contains a static field called properties that was the problem.

[janbartel]

Note to self: when merging through to jetty-12, remember to modify ee9 ELContextCleaner to also ignore NoSuchFieldExceptions to prevent lines like this during shutdown:

JettyShutdownThread: Not cleaning cached beans: no such field javax.el.BeanELResolver.properties

[olamy]

Note to self: when merging through to jetty-12, remember to modify ee9 ELContextCleaner to also ignore NoSuchFieldExceptions to prevent lines like this during shutdown:

why not simply remove it in jetty-12?

JettyShutdownThread: Not cleaning cached beans: no such field javax.el.BeanELResolver.properties

[janbartel]

@olamy I've removed it already from ee10, but I figure I need to keep it consistent for ee8 and ee9.

[janbartel]

Merged through to jetty-12.