Elasticsearch: Discontinue EOL versions 7.0 and 7.1 support

Remove support for elasticsearch versions 7.0 and 7.1, as both became
EOL recently [1].

[1] https://www.elastic.co/support/eol

Change-Id: I57fff58fbeb36c824608bc384bb32c8869145cb9
3 files changed
tree: a7afb81a8eb1636ffe2710811172f47153e99a35
  1. java/
  2. javatests/