Create or update selected site resupply associations REST Endpoints

Randomization and Supplies/Settings APIs/Resupply Group Settings/Create or update selected site resupply associations
The operations from the Randomization and Supplies/Settings APIs/Resupply Group Settings/Create or update selected site resupply associations category.
v1.0
Method: post
Path: /ec-ors-svc/rest/v1.0/studies/{studyId}/{mode}/site/resupplies/updateselected