Fix - Ensure that zookeeper starts on proper server

- Gather info about coreos hosts ips and ids
- Ensure that zookeeper instances starts accoarding to what will be
defined in zoo.cfg file
Merge branch 'feature/zookeeper_ha' into develop
Add - script to return all current zookeeper nodes

 - get_zookeeper_endpoints.sh returns connection info about zookeeper
 servers registered in etcd
Add - added module to get coreos machines info

- more modules might need info about coreos machines therefore I've
created simple bash/awsk based get_coreos_machines module