Add placementId request param to Yieldmo bid adapter (#1632)

* Add ym_placement_id request param to yieldmo bid adapter

* Add yieldmo placementId param to integration examples

Author: cdoher01

integrationExamples/gpt/pbjs_example_gpt.html

@@ -340,7 +340,9 @@
                     },
                     {
                         bidder: 'yieldmo',
-                        params: {}
+                        params: {
+                            placementId: 'ym_12341234' // Optional Yieldmo Placement ID
+                        }
                     },
                     {
                         bidder: 'adequant',

modules/yieldmoBidAdapter.js

@@ -51,6 +51,10 @@ var YieldmoAdapter = function YieldmoAdapter() {
       placement.placement_id = bid.placementCode;
       placement.sizes = bid.sizes;
 
+      if (bid.params && bid.params.placementId) {
+        placement.ym_placement_id = bid.params.placementId;
+      }
+
       placements.push(placement);
     }