Flakey Integration Test in post-reset-master

[Stephen Connolly]

https://builds.apache.org/view/Maven/job/maven-jenkinsfile/job/post-reset-master/6/testReport/junit/org.apache.maven.it/MavenITmng3599useHttpProxyForWebDAVTest/testitUseHttpProxyForWebDAV_2/

Seems to fail at random on Windows...