Add max_scrolling_count setting to limit scrolling behavior

[KarolyBujtor]

Problem: when the rule query has a large result set (e.g.: more than 1 million documents) it starts to load all documents to memory which eats up all of the memory on the machine.

Solution: added the max_scrolling_count setting to potentially limit the number of scrolling requests.

The default max_scrolling_count setting is 0, which doesn't alter the current behavior.

Documentation has been updated.

[Qmando]

Thanks for the contribution, looks good!

[sherifabdlnaby]

This is very useful! Why wasn't this added to release :/

[Qmando]

It was. It's in the latest release, 0.2.1.

[sherifabdlnaby]

The documentation is outdated then, however, I failed to get it to work, it still scrolls the entire result :/

[Qmando]

It looks like the documentation failed to update from the source. I'll double check that.

Would you mind sharing your rule configuration?