Indexing a site in elasticsearch when its not the active search option fails

[Robert Lyon]

The cron will ignore the indexing when elasticsearch is not active - but this is annoying if we want to index the site before switching from internal to elasticsearch.

We have the htdocs/admin/cli/fast_index.php allowing us to index the site faster and so can switch to elasticsearch then index the site fairly rapidly.

But what would be better is being able to use the htdocs/admin/cli/fast_index.php when the site is still on internal search so it's all ready when we cut over.

Also we need a flag when switching from internal to elasticsearch so that it doesn't drop / create the index again on change