sample warnings...
[obalyuk@obalyuk-t450s elk]$ ansible-playbook -i hosts elastic-setup.yml
[WARNING]: While constructing a mapping from /home/obalyuk/Projects/misc-scripts/ansible/elk/elastic-setup.yml, line 23, column 5, found a duplicate dict key (es_scripts). Using last defined value only.
[WARNING]: While constructing a mapping from /home/obalyuk/Projects/misc-scripts/ansible/elk/elastic-setup.yml, line 23, column 5, found a duplicate dict key (es_templates). Using last defined value only.
[WARNING]: While constructing a mapping from /home/obalyuk/Projects/misc-scripts/ansible/elk/elastic-setup.yml, line 23, column 5, found a duplicate dict key (es_version_lock). Using last defined value only.
Renamed vars, set the tasks to use the es_user and es_group vars in elasticsearch-optional-user.yml. Modifed README.md to list the es_user_id and es_group_id vars, made note that both vars are required if they are used. Removed the commented out instances of the vars in defaults/main.yml.
Added es_user, es_group, es_user_id, es_group_id vars to config testing.
Made conditionals use explicit 'is defined' test.
Add tests for es_user_id and es_group_id.
Update defaults/main.yml and test/integration/config.yml to match master plus test config additions.
Address the issue [ansible-elasticsearch
#4](https://github.com/elastic/ansible-elasticsearch/issues/4) which
add proxy for plugin installation and more generally es_proxy_host and
es_proxy_port for global usage.
Right now, it’s only used for plugins installation. In the futur, it
can be used (or defined) in the java_opts within the default file for
instance (elasticsearch.j2)
