Description of the problem including expected versus actual behavior:
The short explaination:
The field template In templates is vague because it is pattern matching the indices which will be working on, I think that the name should be somthing like Index pattern or so.

The Long one:
First to mention, I have started to use elasticsearch today,
I have used a twitter template which I couldn't understand why is not working.
I have searched the template file maybe It contains the index name and thats the reason It didn't work , I have noticed that when I changed the index name to the template name everything was just fine so I understood that I need to write about Index templates and I have understood that there is an index pattern matching with the template name.