Update f_defaults.conf to support elasticsearch returner

[ernstae]

This is a proposed change that we (UW IHME) have been using in production for a few weeks, and a needed deviation from the master branch of the salt-formula

This is reasonably simple, by detecting minion pillar data with elasticsearch configuration for the returner, and spits out the necessary YAML.

Example pillar:

      elasticsearch:
            ----------
            functions_blacklist:
                - test.ping
                - saltutil.findjob
                - pillar.items
                - grains.items
            hosts:
                - 10.0.0.1:9200
                - 10.0.0.2:9200
                - 10.0.0.3:9200
                - 10.0.0.4:9200
                - 10.0.0.5:9200
            index_date:
                True
            number_of_replicas:
                1
            number_of_shards:
                5
            states_count:
                True
            states_order_output:
                True
            states_single_index:
                True

Example output:

#####   elasticsearch connection settings  #####
##########################################
elasticsearch.number_of_replicas: 1
elasticsearch.states_order_output: True
elasticsearch.states_count: True
elasticsearch.number_of_shards: 5
elasticsearch.states_single_index: True
elasticsearch.index_date: True
elasticsearch.hosts:
  - 10.0.0.1:9200
  - 10.0.0.2:9200
  - 10.0.0.3:9200
  - 10.0.0.4:9200
  - 10.0.0.5:9200
elasticsearch.functions_blacklist: 
  - test.ping
  - saltutil.findjob
  - pillar.items
  - grains.items

[aboe76]

Looks clean and I see no issues

[jochumdev]

Looks good to me, needs a Squash though :)

[aboe76]

@pcdummy and @ernstae thanks