Undertow span is finished before last servlet filter

[pavolloffay]

Describe the bug

Undertow instrumentation finishes server request span before the first servlet filter exits.

This has two implications:

• potentially wrong timing information
• additional instrumentation cannot add information to span in the servlet filter because the span has already been finished.

Steps to reproduce
https://github.com/wildfly/quickstart/blob/11.0.0.Final/jaxrs-client/src/main/java/org/jboss/as/quickstarts/jaxrsclient/rest/ContactResourceRESTService.java
Deploy on http://download.jboss.org/wildfly/10.1.0.Final/wildfly-10.1.0.Final.zip

What did you expect to see?

Span should be recording events after chain.doFilter(request, response);

What did you see instead?

Span is not recording events after chain.doFilter(request, response);

What version are you using?
0.17.0

Environment
JDK 11
WF 10.1.0

[pavolloffay]

cc) @laurit

[pavolloffay]

The issue seems to be present only for post request

curl -ivX POST -H "Content-Type: application/json" localhost:8080/jaxrs-client/rest/contacts -d '{"id": 15, "name": "jdoe"}'