swh-search: upgrade elasticsearch to 7.15.2
- specify the memory because with the new version of ES /java try to reserve as much memory as they can
Related to swh-search#3741 (closed)
Migrated from D6685 (view on Phabricator)
Staging instance, all changes can be removed at any time
Related to swh-search#3741 (closed)
Migrated from D6685 (view on Phabricator)