Deduplication of configuration

[gavinmcnair]

It would be nice if templates could be defined to reduce duplication.

An example of this might be

templates:
    web_event: 
      partitions: 10
      replication: 1234567
      config:
          cleanup.policy: delete
          retention.ms: 604800000
          min.insync.replicas: 2    

topics:
    web_view:
      template: web_event
    web_click:
      template: web_event
      config.cleanup.policy: example_override
    different_topic:
      partitions: 12
      replication: 89101112
      config:
          cleanup.policy: delete
          retention.ms: 6000
          min.insync.replicas: 3

where
web_view is an example of a topic that mirrors the template exactly
web_click is an example of a topic which overrides a single element of a template
different_topic is an example of a topic which is not base on a template

[lacarvalho91]

Agreed we need something like this. I would say cleanup.policy: example_override would need to be:

config:
     cleanup.policy: example_override

You might have meant that anyway :) just to avoid confusion