Entity Image fails for CSV Export

[tdashworth]

Describe the bug
I have a schema with the field <field displayname="Image" name="new_image" type="image" primaryKey="false" customfield="false" /> which is failing with the error Error:Not supported attribute type System.Byte[] only for CSV exports (JSON worked fine).

To Reproduce

1. Generate a schema which includes an entity with an entityimage and include that field like above.
2. Run this through the CSV data exporter and the above error should occur.

Expected behavior
This error not to be thrown and instead the base64 to be exported or safe handling of this field type to be ignored.