Add Elasticsearch cluster state output
Add Elasticsearch cluster state output

We use the to find out if the ES cluster is in a read only state due to
disk full events.

Signed-off-by: Will Fisher <392743f9dc9e2aef3201bd7129e55eb620ce557e@chef.io>

chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server