Revert back to using host config option for defining multiple hosts

[suyograo]

1.4.2 has config option host http://logstash.net/docs/1.4.2/outputs/elasticsearch#host

this was changed in logstash-plugins/logstash-input-elasticsearch@add0954 which is not backward compatible

We need to go back to using host (even if it supports multiple hosts now)

[jordansissel]

Yep! :validate => :arrray allows single-value settings (intentionally, yay config parser!) so host => "foo" and host => [ "foo" ] are equivalent in logstash config.

+1 for going back to host

[suyograo]

Seems to be fixed in the latest https://github.com/logstash-plugins/logstash-output-elasticsearch/blob/master/lib/logstash/outputs/elasticsearch.rb#L101

[suyograo]

Tested fixed