Bug 32030: (follow-up) Fix datatable.js order_by

Bug 32030: (follow-up) Fix datatable.js order_by

The previous change was not working, we need to define a render function
to prevent a DT error.

"Requested unknown parameter 'me.agreement_id,me.name' for row 0, column 0"

Signed-off-by: Jonathan Field <jonathan.field@ptfs-europe.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>