elasticsearch/logstash — pull request #1710 by maraca (2014-09-08 23:58:41+00:00)
Title: Reformats the metrics name when namespace|sender are avoided.

This scenario can be encountered when a user does not specify the `namespace` or the `sender` options.
By setting `namespace` and `sender` to `nil` the metric then looks like `..metric`

With this code we now have:
`..my.metric` => `my.metric`
`my..metric` => `my.metric`