Add created property
<o:property name="artifactPath" type="string" />
<o:property name="sizeInBytes" type="long" />
<o:property name="downloadCount" type="integer" />
+ <o:property name="created" type="date" />
<o:property name="lastUpdated" type="date" />
<o:property name="lastUsed" type="date" />
</o:createClass>
