[14.x] [WFCORE-5251] Upgrade Undertow to 2.2.4.Final

[jmesnil]

Jira: https://issues.redhat.com/browse/WFCORE-5251

    Release Notes - Undertow - Version 2.2.4.Final

Bug

• [UNDERTOW-1406] - WebSocketClient13TestCase gets stuck with JDK-11 early build 28
• [UNDERTOW-1824] - CVE-2020-27782 AJP handler must send AJP responses for bad requests & internal server errors
• [UNDERTOW-1827] - InMemorySessionManager must bump session timeout on requestStarted
• [UNDERTOW-1828] - NullPointerException occurred if a servlet calls HttpServletRequest#getContextPath() while EAP was shutting down
• [UNDERTOW-1833] - Unnecessary code removal from Http2EndExchangeTestCase
• [UNDERTOW-1838] - CVE-2020-10687 wildfly-undertow: Undertow: Incomplete fix for CVE-2017-2666 due to permitting invalid characters in HTTP requests
• [UNDERTOW-1839] - Undertow SSLConduit write is not synchronized
• [UNDERTOW-1841] - Undertow fails to mvn install twice

Task

• [UNDERTOW-1744] - Port Undertow to new Jakarta EE9

Sub-task

• [UNDERTOW-1757] - Release Undertow for Jakarta EE9
• [UNDERTOW-1785] - Merge Jakarta EE9 Code (depends on Batavia)

[jmesnil]

Upstream PR is #4471