title: Redis cofiguration for multiple entity managers (symfony 2)
body: <p>I would like to configure redis in symfony 2 in case when I have 2 entity managers defined (in config.yml file):</p>
  
  <pre><code>doctrine:
      dbal:
          default_connection: default
          connections:
              default:
                  (...connection settings...)
               warehouse:
                  (...connection settings...)
  
      orm:
          auto_generate_proxy_classes: true
          default_entity_manager: default
          entity_managers:
              default:
                  connection: default
                  auto_mapping: true
                  mappings:
                      some_name:
                          type: xml
                          dir: (...dir1...)
                          prefix: (...prefix...)
                          is_bundle: false
              warehouse:
                  connection: warehouse
                  mappings:
                      some_name:
                          type: xml
                          dir: (...dir1...)
                          prefix: (...prefix...)
                          is_bundle: false
  </code></pre>
  
  <p>Currently, snc-redis is configured for one entity manager, default:</p>
  
  <pre><code>snc_redis:
      clients:
          default:
              type: predis
              alias: default
              dsn: redis://redis
          doctrine:
              type: predis
              alias: doctrine
              dsn: redis://redis
      doctrine:
          metadata_cache:
              client: doctrine
              entity_manager: default
              document_manager: default
          result_cache:
              client: doctrine
              entity_manager: [default]
          query_cache:
              client: doctrine
              entity_manager: default
  </code></pre>
  
  <p>How changed it to serve multiple entity managers? 
  I saw also that redis can be defined in each doctrine -> orm -> entity manager section in example:</p>
  
  <pre><code>entity_managers:
      default:
          metadata_cache_driver: redis
          result_cache_driver: redis
          query_cache_driver: redis
  </code></pre>
  
  <p>it's equivalent to define it in snc_redis -> doctrine section?</p>