records: problem uploading to new Sandbox record from hepdata-cli for non-admin user

[GraemeWatt]

If a non-admin user tries to upload to a new Sandbox record using the hepdata-cli upload they get an error message:

HTTPError: 403 Client Error: FORBIDDEN for url: https://www.hepdata.net/record/cli_upload
Reason: Email <email> does not correspond to a confirmed uploader for this record.

This seems to be a bug introduced in PR #329. The check:

hepdata/hepdata/modules/records/views.py

Lines 806 to 810 in 3dfb531

	# Check the user has upload permissions for this record
	if not has_upload_permissions(recid, user, is_sandbox):
	return jsonify({
	"message": "Email {} does not correspond to a confirmed uploader for this record.".format(str(user_email))
	}), 403

should not be made for a new Sandbox record (recid=None).

Thanks to Louie Corpe (@ldcorpe) for reporting this bug.