Fix bug in UndertoneBidAdapter (#2027)

* fix bug in UndertoneBidAdapter

Fix bug that caused the page domain to be sent as an array instead of a string.
Also added a page url parameter to the request

* fix lint error

* fix lint error

modules/undertoneBidAdapter.js

@@ -20,8 +20,13 @@ export const spec = {
     const payload = {
       'x-ut-hb-params': []
     };
-    const host = utils.getTopWindowLocation().host;
-    const domain = /[-\w]+\.(?:[-\w]+\.xn--[-\w]+|[-\w]{3,}|[-\w]+\.[-\w]{2})$/i.exec(host);
+    const location = utils.getTopWindowLocation();
+    let domain = /[-\w]+\.(?:[-\w]+\.xn--[-\w]+|[-\w]{3,}|[-\w]+\.[-\w]{2})$/i.exec(location.host);
+    if (domain == null || domain.length == 0) {
+      domain = null;
+    } else {
+      domain = domain[0];
+    }
 
     const pubid = validBidRequests[0].params.publisherId;
     const REQ_URL = `${URL}?pid=${pubid}&domain=${domain}`;
@@ -30,6 +35,7 @@ export const spec = {
       const bid = {
         bidRequestId: bidReq.bidId,
         hbadaptor: 'prebid',
+        url: location.href,
         domain: domain,
         placementId: bidReq.params.placementId,
         publisherId: bidReq.params.publisherId,