Add AttributeMachine functionality to OUSM
OUSM does not have the same ability to show/hide variants & out-of-stock products in the same way that the PROD page does. PROD is able to do it by leveraging AttributeMachine, and AttributeMachine requires certain
<form/> elements & names in that don't exist on OUSM.
Assign these extra items to OUSM:
Attribute Machine (code: attributemachine)