JENKINS-18607 Xvfb plugin doesn't work on matrix jobs with slaves on the
same machine
Revert "JENKINS-18607 Xvfb plugin doesn't work on matrix jobs with slaves on the"

This reverts commit 61ca30dec1da9e4f2cef85b995f0806f35a66b7c.
Merge branch 'master' of https://github.com/jenkinsci/xvfb-plugin.git
New feature that lets Xvfb to pick the display name