* stable-2.15: Add support for Elasticsearch version 7.3.* Also update ElasticV7QueryProjectsTest to use V7_3. Change-Id: Ib7081c5b15756e2ca91d448430928b2f5b8aca50
* stable-2.15: Add support for Elasticsearch version 7.3.* Also update ElasticV7QueryProjectsTest to use V7_3. Change-Id: Ib7081c5b15756e2ca91d448430928b2f5b8aca50