Bidglass Bid Adapter : remove params.adUnitId numeric requirement (prebid#13091)

* Added bidglass adapter + test

* PR Review Updates:

- Added formal params to getUserSyncs function definition
- getUserSyncs now always returns an array
- Improved unit test coverage

* PR Review Updates:

- Removed unused methods: getUserSyncs, onTimeout, onBidWon,
onSetTargeting
- Removed getUserSyncs unit test
- Removed "dead code"
- Removed some unnecessary comments
- Fixed usage of parseInt

* Bid Glass Bid Adapter: pass options in bid request

* Merge externally set targeting params

* Updates to address gulp errors

* Get `bidglass` reference from window

* Add support for meta.advertiserDomains

* Remove numeric requirement for  params.adUnitId

Author: dliebner

modules/bidglassBidAdapter.js

@@ -21,7 +21,7 @@ export const spec = {
    * @return boolean True if this is a valid bid, and false otherwise.
    */
   isBidRequestValid: function(bid) {
-    return !!(bid.params.adUnitId && !isNaN(parseFloat(bid.params.adUnitId)) && isFinite(bid.params.adUnitId));
+    return !!bid.params.adUnitId; // only adUnitId is required
   },
   /**
    * Make a server request from the list of BidRequests.