Updates needed for integrationExamples/gpt/x-domain/creative.js

[brondsem]

Type of issue

Bug

Description

• the JSON.stringify call has a dangling adServerDomain all by itself
• In IE, the ad doesn't render and console has this error: SEC7111: HTTPS security is compromised by (null) https://tpc.googlesyndication.com/safeframe/1-0-5/html/container.html
• In IE < 11, const raises a syntax error, var should be used instead.
• The id var isn't defined anywhere
• Per Mobile Auto Redirect Ads - Increasing Major PROBLEM. #927 (comment) adServerDomain should check the current protocol (or just default to https)
• Instead of %%PUBLISHER_DOMAIN%%, %%PATTERN:url%% exists already and can be parsed to get the domain.
• would be nice to have <script>....</script> around the whole JS (and then save the file as .html) so it is a full example ready to paste directly in.

I can provide a merge request shortly for most of these items, but I don't know how to fix the IE HTTPS error.

[brondsem]

http://joji.me/en-us/blog/how-to-resolve-sec7111-https-security-is-compromised-by-null-error-in-ie11 indicates its the doc.write calls that IE doesn't like.

[brondsem]

Fixed with #955 and #971