DistrictmDMX: adding support for schain and remove content type to de…

…fault to prebid selection (prebid#4366)

* adding DMX

test @97%, two files added one updated

* Update districtm_spec.js

* Update districtmDMX.js

* adding all districtm needed file

* remove legacy file

* remove typo || 0 in the test method

* force default to return a valid width and height

* update unit test code for failing test

* changed class for an object

* remove package-lock.json

* change file name for dmx adapter

* renamed files

* restaure package-lock.json

* update to last package-lock state

* update gdpr user consent

* fix sizes issue

* Documentation updates

Adding the readme.md info

* update file name and update unit testing import file location

* current machine state

* lint correction

* remove variable assigment duplicate

modules/districtmDMXBidAdapter.js

@@ -60,6 +60,7 @@ export const spec = {
   },
   buildRequests(bidRequest, bidderRequest) {
     let timeout = config.getConfig('bidderTimeout');
+    let schain = null;
     let dmxRequest = {
       id: utils.generateUUID(),
       cur: ['USD'],
@@ -80,6 +81,12 @@ export const spec = {
       dmxRequest.user.ext = {};
       dmxRequest.user.ext.consent = bidderRequest.gdprConsent.consentString;
     }
+    try {
+      schain = bidRequest[0].schain;
+      dmxRequest.source = {};
+      dmxRequest.source.ext = {};
+      dmxRequest.source.ext.schain = schain || {}
+    } catch (e) {}
     let tosendtags = bidRequest.map(dmx => {
       var obj = {};
       obj.id = dmx.bidId;
@@ -96,14 +103,11 @@ export const spec = {
       return obj;
     });
     dmxRequest.imp = tosendtags;
+
     return {
       method: 'POST',
       url: DMXURI,
       data: JSON.stringify(dmxRequest),
-      options: {
-        contentType: 'application/json',
-        withCredentials: true
-      },
       bidderRequest
     }
   },