74bb6d6184
Implement online reindexing for ElasticSearch based on the code for Lucene online reindex. Testing scenario: 1. Start fresh Gerrit site with this patch 2. Create account 3. Verify data in ElasticSearch: curl http://localhost:9200/gerritaccounts_0004/ curl http://localhost:9200/gerritaccounts_0004/_search 4. Stop Gerrit 5. Cherry pick change I77e1643cd1a7fbef9f4d2fa214823759188e9592 6. Start Gerrit 6. Wait for log message: Starting online reindex from schema version 4 to 5 7. Verify state in ElasticSearch: curl http://localhost:9200/gerritaccounts_0005/ curl http://localhost:9200/gerritaccounts_0005/_search Entry for user account created in step 2 should have "elastic_online" property with value "reindex work". Change-Id: I9efcf5735e65b4f2dc2a97914d398f81656fc12a