Add minor optimization to AbstractErrors

Issue: SPR-11304
Add method for HTTP PATCH in MockMvcRequestBuilders

Issue: SPR-11299

This is short to avoid having to use MockMvcRequestBuilders.request()
and instead have a simple patch(url, params...)
Removed TestGroup.LONG_RUNNING marker from Groovy and JRuby tests
Fixed resolveProxyTargetClass exception message
Added compatibility note on WildFly 8
Replaced reflection code with straight Servlet 3.0 setAsyncStarted call
Polishing
Fall back on user in the Jetty UpgradeRequest

The Jetty ServletWebUpgradeRequest implements getUserPrincipal to
return the Principal from the HttpServletRequest on the upgrade.
This change ensures we can fall back on that.

However the JettyRequestUpgradeStrategy still passes the user from
HttpServletRequest from the upgrade, in order to work with Jetty
9.0.x and avoid running into this 9.1.x issue:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=423118
Allow hook to associate user with WebSocket session

This change adds a protected method to DefaultHandshakeHandler to
determine the user for the WebSocket session. By default it's
implemeted to obtain it from the request.

Issue: SPR-11228
CronTriggerFactoryBean allows 'calendarName' and 'description' to be specified

Also making 'description' available on SimpleTriggerFactoryBean.

Issue: SPR-9771
(cherry picked from commit 7502ecd)
Polishing