Java 10: Use latest maven-plugin-plugin
Java 10: Use latest maven-plugin-plugin

- IllegalArgumentException: Failed to analyze
  com/yahoo/config/codegen/LeafCNode$NoClassNoDefaultLeafCNode.class

vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa,vespa-engine/vespa