Fix Exception PropertyNotFoundException: iptc:keywords

On:
https://openshift.dev.nuxeo.io/console/project/int-nbm-dev/
I see this exception in the logs:

2018-04-09 19:44:40,532 ERROR [EventServiceImpl] Exception during binaryMetadataSyncListener sync listener execution, continuing to run other listeners
org.nuxeo.ecm.core.api.model.PropertyNotFoundException: iptc:keywords
at org.nuxeo.ecm.core.api.impl.DocumentModelImpl.getProperty(DocumentModelImpl.java:1209)
at org.nuxeo.binary.metadata.internals.BinaryMetadataServiceImpl.isDirtyMapping(BinaryMetadataServiceImpl.java:361)
at org.nuxeo.binary.metadata.internals.BinaryMetadataServiceImpl.handleUpdate(BinaryMetadataServiceImpl.java:253)
at org.nuxeo.binary.metadata.internals.BinaryMetadataServiceImpl.handleSyncUpdate(BinaryMetadataServiceImpl.java:243)
at org.nuxeo.binary.metadata.internals.listeners.BinaryMetadataSyncListener.handleEvent(BinaryMetadataSyncListener.java:59)
at org.nuxeo.ecm.core.event.impl.EventServiceImpl.fireEvent(EventServiceImpl.java:242)
at org.nuxeo.ecm.core.api.AbstractSession.notifyEvent(AbstractSession.java:277)
at org.nuxeo.ecm.core.api.AbstractSession.saveDocument(AbstractSession.java:1534)
at org.nuxeo.ecm.platform.picture.PictureViewsGenerationWork.work(PictureViewsGenerationWork.java:122)