Revert "Add support for Elasticsearch version 7.9.*"

Revert submission 291062

Reason for revert: requires an httpclient that Google cannot support
Reverted Changes:
I1fc91bce9:Align http dependencies with elasticsearch-rest-cl...
Ifb941eea6:Add support for Elasticsearch version 7.10.*
I7d76ece60:Add support for Elasticsearch version 7.9.*

Change-Id: Ib95a8c053fa7f046596458e7eb719a409847cb82
9 files changed
tree: a7afb81a8eb1636ffe2710811172f47153e99a35
  1. java/
  2. javatests/