Add parameter to specify bind ip for discovery/data port

Description

Actually we have following parameters:

1. elasticsearch_bind_ip
2. elasticsearch_bind_port
3. elasticsearch_discovery_port

There is necessity of exposing parameter to set bind ip for discovery/data network layer. API network could be separated from data network.

Proposal

Change role API to:

1. elasticsearch_api_network_ip
2. elasticsearch_api_network_port - default: 9200
3. elasticsearch_data_network_ip - default: "{{ elasticsearch_api_network_ip }}"
4. elasticsearch_data_network_port - default: 9300

Links / references