
Upgrade elasticsearch-rest-client to 7.4.0. Add V7_4 to the version manager, and use this in all the V7 tests. Use the 7.4.0 image from blacktop in the test container. Change-Id: Ib993f078c142afe34d6f6be83f745464c16b0d2e
Upgrade elasticsearch-rest-client to 7.4.0. Add V7_4 to the version manager, and use this in all the V7 tests. Use the 7.4.0 image from blacktop in the test container. Change-Id: Ib993f078c142afe34d6f6be83f745464c16b0d2e