title: geo_point for all indexs template mappings
body: <p>I have a field "location" with "lat" and "lon" fields on all my logs. The logs indexs on elastic are different. Some of them goes to "logstash-YYY-MM-dd", others go to "exception-YYYY-MM-dd", and many others.
  But I can't make all of them to mapp the location field as a geo_point. I'm aware of the <em>default</em> mapping and the dynamic mappings but I can't make it work. I don't undertand the documentation or find a clear example on the web. 
  What I want is that elastic manages all "location" fields, from any log, and converts them to "geo_point" no matter the index or type or whatever. Is it possible?</p>