webservice image upload: support setting `Image` attributes

[nickdos]

When remotely uploading images via http://images.ala.org.au/ws/uploadImage, top-level metadata (attributes of the Image class), as opposed to the Image.metaData (arbitrary data).

In particular there are two fields for Image that should be set:

• copyright
• attribution

if those fields are present in the params.metadata POSTed data.

Currently these values are going through to the "System" metadata but do not appear on the output of http://images.ala.org.au/ws/getImageInfo/{imageId} (unless the param includeMetadata=true is added.

[djtfmartin]

I think we should be sticking with dublin core. So probably the following:

• license
• rightsHolder
• accessRights

as opposed to copyright ( = license) and attribution ( = rightsHolder)

cc @M-Nicholls @charvolant

[nickdos]

Also need to support the "photographer" field... which might be attribution?

[M-Nicholls]

the term in the DwC extension is "creator" but we currently use photographer. it can be different to the attribution though - that's determined by the person that owns the rights.

[djtfmartin]

This is done on the master. Just need to deploy to production

[djtfmartin]

This is all done now.