Jake Landis 51bb27a991
ingest: date_index_name processor template resolution (#31841)
This change adds support for template snippet (e.g. {{foo}}) resolution
in the date_index_name processor. The following configuration options
will now resolve a templated value if so configured:

* index_name_prefix  (e.g "index_name_prefix": "myindex-{{foo}}-")
* date_rounding (e.g. "date_rounding" : "{{bar}}")
* index_name_format (e.g."index_name_format": "{{baz}}")
2018-07-11 10:13:41 -05:00
..
2018-02-20 08:02:02 +01:00