Elasticsearch: Discontinue EOL version 7.5 support

Remove support for elasticsearch V7_5, as it became EOL since June [1].

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

Change-Id: I46cc3849a5cf1fad30b007fe09f8d1cdbe4d588b
3 files changed
tree: ef157e09bb91ebd2fbf5957c9f0007c44dbe6ea2
  1. java/
  2. javatests/