* Elasticsearch: Add Moving Function Pipeline Aggregation
* Removing support for moving average in 7.x
* Fixing getMetricAggTypes to handle undefined esVersion
* Adding moving_fn to go code
* Update public/app/plugins/datasource/elasticsearch/metric_agg.ts
Co-authored-by: Giordano Ricci <grdnricci@gmail.com>
* Adding test for esversion 70
* Removing default value for script, adding placeholder instead
* Fixing formatting
* Adding code for handling missing or obsolete aggregations
Co-authored-by: Giordano Ricci <grdnricci@gmail.com>
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