Martijn van Groningen 1936d6118d Added index template for the '.ingest' index and added logic that ensure the index template is installed.
An index template for the '.ingest' index is required because:
* We don't want arbitrary fields in pipeline documents, because that can turn into upgrade problems if we add more properties to the pipeline dsl.
* We know what are the usages are of the '.ingest' index, so we can optimize for that and prevent that this index is used for different purposes.

Closes #15001
2015-12-24 15:18:07 +01:00
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