include optional direct dependencies in classpath and resolve artifacts. These are not included in project.getTestArtifacts() while they should be required if dependency is direct (seems to be a problem only with reactor projects). Modified master test in order to manually check file content instead of comparing files (easier to explain and comment, ignore order).
maven/components/trunk/maven-plugins/maven-eclipse-plugin/src/main/java/org/apache/maven/plugin/eclipse/EclipseClasspathWriter.java