Reindex Elasticsearch projects index to update integer with long type

Arturo Herrerorequested to merge
502817-reindex-elasticsearch-projects-to-update-integer-to-long-type into master

Description

This migrates the Elasticsearch projects index to match the PostgreSQL database types with the Elasticsearch documents indexed from integer to long.

Related work:

Related to #502817 (closed).

Edited by Arturo Herrero

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