Move jaxb2-plugin version definition to root pom pluginManagement, update to latest.

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1455227 13f79535-47bb-0310-9956-ffa450edef68
Some pom cleanup so a "mvn eclipse:eclipse" will actually result in projects that are importable into eclipse without errors.

git-svn-id: https://svn.apache.org/repos/asf/webservices/wss4j/trunk@1455228 13f79535-47bb-0310-9956-ffa450edef68