Jest does not validate <rootDir> reference in some environments

Created by: dinukadesilva

In the generated project, When I run npm run test in a Jenkins box, the following reference was failing. And it seems that Jest does not validate the resultant URL.

"setupFiles": [ "<rootDir>\\config\\polyfills.js" ]

some environments return '/var/lib/jenkins/jobs/test/workspace/\config\polyfills.js'