tests/data/sample-features: missed foo0.png reference in mets.xml
<mets:file MIMETYPE="application/vnd.prima.page+xml" ID="foo0">
<mets:FLocat LOCTYPE="OTHER" OTHERLOCTYPE="FILE" xlink:href="image_features.page.xml"/>
</mets:file>
+ <mets:file MIMETYPE="image/png" ID="foo0-img">
+ <mets:FLocat LOCTYPE="OTHER" OTHERLOCTYPE="FILE" xlink:href="foo0.png"/>
+ </mets:file>
<mets:file MIMETYPE="image/png" ID="foo1">
<mets:FLocat LOCTYPE="OTHER" OTHERLOCTYPE="FILE" xlink:href="foo1"/>
</mets:file>
