add support for Ubuntu 20.04 and bump OpenSearch to 1.2.3

[saravanan30erd]

Issues Resolved

Fix #20 #31

@peterzhuamazon I tested only single node setup, you can test multi-node setup with ubuntu 20.04.

[peterzhuamazon]

https://github.com/opensearch-project/ansible-playbook/pull/21#issuecomment-996004652

[peterzhuamazon]

Test Ubuntu:

ok: [os1] => {
    "msg": {
        "active_primary_shards": 2,
        "active_shards": 7,
        "active_shards_percent_as_number": 100.0,
        "cluster_name": "development-cluster",
        "delayed_unassigned_shards": 0,
        "discovered_master": true,
        "initializing_shards": 0,
        "number_of_data_nodes": 5,
        "number_of_in_flight_fetch": 0,
        "number_of_nodes": 5,
        "number_of_pending_tasks": 0,
        "relocating_shards": 0,
        "status": "green",
        "task_max_waiting_in_queue_millis": 0,
        "timed_out": false,
        "unassigned_shards": 0
    }
}
ok: [os2] => {
    "msg": {
        "active_primary_shards": 2,
        "active_shards": 7,
        "active_shards_percent_as_number": 100.0,
        "cluster_name": "development-cluster",
        "delayed_unassigned_shards": 0,
        "discovered_master": true,
        "initializing_shards": 0,
        "number_of_data_nodes": 5,
        "number_of_in_flight_fetch": 0,
        "number_of_nodes": 5,
        "number_of_pending_tasks": 0,
        "relocating_shards": 0,
        "status": "green",
        "task_max_waiting_in_queue_millis": 0,
        "timed_out": false,
        "unassigned_shards": 0
    }
}
ok: [os3] => {
    "msg": {
        "active_primary_shards": 2,
        "active_shards": 7,
        "active_shards_percent_as_number": 100.0,
        "cluster_name": "development-cluster",
        "delayed_unassigned_shards": 0,
        "discovered_master": true,
        "initializing_shards": 0,
        "number_of_data_nodes": 5,
        "number_of_in_flight_fetch": 0,
        "number_of_nodes": 5,
        "number_of_pending_tasks": 0,
        "relocating_shards": 0,
        "status": "green",
        "task_max_waiting_in_queue_millis": 0,
        "timed_out": false,
        "unassigned_shards": 0
    }
}
ok: [os4] => {
    "msg": {
        "active_primary_shards": 2,
        "active_shards": 7,
        "active_shards_percent_as_number": 100.0,
        "cluster_name": "development-cluster",
        "delayed_unassigned_shards": 0,
        "discovered_master": true,
        "initializing_shards": 0,
        "number_of_data_nodes": 5,
        "number_of_in_flight_fetch": 0,
        "number_of_nodes": 5,
        "number_of_pending_tasks": 0,
        "relocating_shards": 0,
        "status": "green",
        "task_max_waiting_in_queue_millis": 0,
        "timed_out": false,
        "unassigned_shards": 0
    }
}
ok: [os5] => {
    "msg": {
        "active_primary_shards": 2,
        "active_shards": 7,
        "active_shards_percent_as_number": 100.0,
        "cluster_name": "development-cluster",
        "delayed_unassigned_shards": 0,
        "discovered_master": true,
        "initializing_shards": 0,
        "number_of_data_nodes": 5,
        "number_of_in_flight_fetch": 0,
        "number_of_nodes": 5,
        "number_of_pending_tasks": 0,
        "relocating_shards": 0,
        "status": "green",
        "task_max_waiting_in_queue_millis": 0,
        "timed_out": false,
        "unassigned_shards": 0
    }
}

{
  "cluster_name" : "development-cluster",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 5,
  "number_of_data_nodes" : 5,
  "discovered_master" : true,
  "active_primary_shards" : 3,
  "active_shards" : 9,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

{
  "name" : "os1",
  "cluster_name" : "development-cluster",
  "cluster_uuid" : "POS_8nGxT0GqvP_h2vpDkQ",
  "version" : {
    "distribution" : "opensearch",
    "number" : "1.2.3",
    "build_type" : "tar",
    "build_hash" : "8a529d77c7432bc45b005ac1c4ba3b2741b57d4a",
    "build_date" : "2021-12-21T01:36:21.407473Z",
    "build_snapshot" : false,
    "lucene_version" : "8.10.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "The OpenSearch Project: https://opensearch.org/"
}