file_relative_path missing from linked file import

[nhammond]

loom file import --link gs://cgs-dev-sequencer-dropin/190417_A00731_0009_AHK7JVDMXX.tar.gz

Client returns this error

ERROR! Failed to import files: 'Failed to POST DataObject: '{'type': 'file', 'value': {'file_relative_path': None, 'upload_status': 'complete', 'imported_from_url': u'gs://cgs-dev-sequencer-dropin/190417_A00731_0009_AHK7JVDMXX.tar.gz', 'file_url': u'gs://cgs-dev-sequencer-dropin/190417_A00731_0009_AHK7JVDMXX.tar.gz', 'filename': u'190417_A00731_0009_AHK7JVDMXX.tar.gz', 'source_type': 'imported', 'link': True, 'md5': 'd7bbfc890ba1f1301d9fbd311ba8b52b'}}'. (500) 500 Server Error: Internal Server Error for url: http://127.0.0.1:80/api/data-objects/'

Server logs contain this error:

IntegrityError: (1048, "Column 'file_relative_path' cannot be null")

[nhammond]

Fixed in 283059a