[TSVB] Old request might override newer request

[shaharmor]

Kibana version: 6.x

Elasticsearch version: 6.0.0-rc1

Browser version: Chrome 62

Description of the problem including expected versus actual behavior:
TSVB doesn't abort old queries when new ones are created

Steps to reproduce:

1. Create a new TSVB time-series visualization
2. Run a long query (over a long time range)
3. While the previous query is still running, update the time range to smaller range
4. The new query will finish before the first one, and update the visualization, and then the old query will finish and override the visualization, even though it was basically "aborted"

[shaharmor]

Any chance for someone to take a look at this?

[lukeelmers]

This issue actually isn't specific to TSVB, but rather to the current querying implementation: see #24058

[alexwizp]

Thanks, closed!