Disable automatic retries and replace Jest retries

[bernd]

we include all SocketExceptions in the list of retriable errors
this way we will always pick a new server from the list when
there's underlying issues

simply retrying the HTTP request against the same server makes little
sense in a cluster, so we disable that in favor of picking a new host

requires unreleased Jest client (2.4.12-jackson)

[joschi]

LGTM. 👍

Tested with the following Graylog configuration setting:

elasticsearch_hosts = http://127.0.0.1:9200/,http://127.0.0.1:9201/,http://127.0.0.1:9202/

And the following docker-compose configuration:

version: '2.2'
services:
  mongo:
    image: mongo:3
    ports:
      - 27017:27017
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:5.6.9
    container_name: elasticsearch
    environment:
      - cluster.name=graylog
      - bootstrap.memory_lock=true
      - xpack.security.enabled=false
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    mem_limit: 1g
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - 9200:9200
    networks:
      - esnet
  elasticsearch2:
    image: docker.elastic.co/elasticsearch/elasticsearch:5.6.9
    container_name: elasticsearch2
    environment:
      - cluster.name=graylog
      - bootstrap.memory_lock=true
      - xpack.security.enabled=false
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=elasticsearch"
    mem_limit: 1g
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - 9201:9200
    networks:
      - esnet
  elasticsearch3:
    image: docker.elastic.co/elasticsearch/elasticsearch:5.6.9
    container_name: elasticsearch3
    environment:
      - cluster.name=graylog
      - bootstrap.memory_lock=true
      - xpack.security.enabled=false
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=elasticsearch"
    mem_limit: 1g
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - 9202:9200
    networks:
      - esnet

networks:
  esnet: