fix #2772 Subrouter failure handler is ignored

[takeseem]

fix #2772 Subrouter failure handler is ignored

[takeseem]

this pull fail ci test for 5.x-stable

in win11 cost > 6h, the laste test is Starting test: SubRouterTest#testSetExceptionHandler

but ok: ci test for 5.x in win11 cost < 7m

• I test the case in windows 11 us vbox, many times, but cannot reproduce
• I think may be it's my process the response's body method is incorrect, and has no timeout, so commit do junit assert in vert.x and add timeout