Revert to EclipseLink 

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1511304 13f79535-47bb-0310-9956-ffa450edef68
Don't attempt to sanitize null values

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1511305 13f79535-47bb-0310-9956-ffa450edef68