UID2 Shared library: Update Optout token to be consistent between UID2 and EUID (prebid#14086)

* added log errors to catch the errors

* fixed lint errors

* making stored optout consistent between uid2 and euid

* remove log error

* add empty catch statements

* made code more consistent

Author: ashleysmithTTD

libraries/uid2IdSystemShared/uid2IdSystem_shared.js

@@ -44,6 +44,7 @@ export class Uid2ApiClient {
   ResponseToRefreshResult(response) {
     if (this.isValidRefreshResponse(response)) {
       if (response.status === 'success') { return { status: response.status, identity: response.body }; }
+      if (response.status === 'optout') { return { status: response.status, identity: 'optout' }; }
       return response;
     } else { return prependMessage(`Response didn't contain a valid status`); }
   }