MWEB-1008 P2 fix for adding pins on a map in modal

Maps are accessible in few places:
* single map pages links which can be found on [Special:Maps](http://maps.wikia.com/wiki/Special:Maps),
* modals displayed after clicking [maps thumbnails in articles](http://mediawiki119.nandy.wikia-dev.com/wiki/EmbedMap).

While refactoring JavaScripts in MW client for maps we introduced new module placed in `intMapsConfig.js`. Unfortunately, we didn't add this file to the modals package which is fixing the described in this PR's title issue. The fix is a one-liner but we'll re-think again the AM packages used by us for maps -- we should simplify them.