MANTRUN-96 : Fix NPE in tests by upgrading maven APIs and embedder to 2.0.4. Plugin's maven prerequisite bumped to 2.0.4.
MANTRUN-96 : Fix NPE in tests by upgrading maven APIs and embedder to 2.0.4. Plugin's maven prerequisite bumped to 2.0.4.

git-svn-id: 6038db50b076e48c7926ed71fd94f8e91be2fbc9@682660 13f79535-47bb-0310-9956-ffa450edef68

khmarbaise/maven-plugins,khmarbaise/maven-plugins,khmarbaise/maven-plugins