[NPANDAY-231] use Maven API for resolving

The maven-project API in 2.x did some magic to populate the artifacts,
such as setting up files for system dependencies. To ensure those all
continue to work, use the existing Maven 2.x API to populate the artifacts
rather than creating them by hand.

git-svn-id: https://svn.apache.org/repos/asf/incubator/npanday/trunk@1573444 13f79535-47bb-0310-9956-ffa450edef68