ClasspathWorkspaceReader may return a wrong POM file when run inside Surefire

The ClasspathWorkspaceReader returns a wrong pom.xml file when the tests are run in Surefire as 'mvn package'.

This is the offending code:

final File pomFile = new File(file.getParentFile().getParentFile(), "pom.xml");

A check against the requested artifact must be done before assuming that this pom.xml is the correct file to be returned in method findArtifact.