This is a core library for Neo4j Kettle use cases like the Neo4j Logging plugin, the Neo4j Output plugin and so on. It adds the Graph data type, the Neo4j Connection and Graph Nodel Metastore elements and so on.
mvn -s path-to-pentaho-maven-settings.txt clean install
See here: https://github.com/pentaho/maven-parent-poms/blob/master/maven-support-files/settings.xml