4-fabric8-plugin.xml

<plugin>
  <groupId>io.fabric8</groupId>
  <artifactId>fabric8-maven-plugin</artifactId>
  <version>2.2.4</version>
  <executions>
    <execution>
      <id>json</id>
      <phase>generate-resources</phase>
      <goals>
        <goal>json</goal>
      </goals>
    </execution>
    <execution>
      <id>attach</id>
      <phase>package</phase>
      <goals>
        <goal>attach</goal>
      </goals>
    </execution>
  </executions>
</plugin>