Put chunk_idle_period in the right place in the ksonnet.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

production/ksonnet/loki/config.libsonnet

@@ -34,6 +34,8 @@
       },
 
       ingester: {
+        chunk_idle_period: '15m',
+
         lifecycler: {
           ring: {
             store: 'consul',
@@ -48,8 +50,6 @@
             },
           },
 
-          chunk_idle_period: '15m',
-
           num_tokens: 512,
           heartbeat_period: '5s',
           join_after: '10s',