Spotlight config migration

DO NOT MERGE

We believe this should be complete and work so we're opening this for comment and suggestion. 

We don't want to merge this until after we have done the services list and module page work in stagecraft and spotlight however. Once we have verified this script works with these changes and doesn't require extra logic we can merge this.

One thing we do need to fix now is to make the spotlight config path used configureable.
Its not the clearest I agree. My only reason for doing it that way was laziness, as all the spotlight_stub json files already contain keys for the data we want to post, plus some others that need changing (relatedpages and modules)