Fix typo in heka/meta/heka.yml

Change-Id: I2aba5f00dfa7aa508f39c0b8bb1f0dd62e3e0db6
diff --git a/heka/meta/heka.yml b/heka/meta/heka.yml
index da2037f..f3bc9b7 100644
--- a/heka/meta/heka.yml
+++ b/heka/meta/heka.yml
@@ -690,7 +690,7 @@
       config:
         decoder: 'ceilometer'
         decode_resources: {{ ceilometer_collector.resource_decoding|lower }}
-        flush_count = 500
+        flush_count: 500
         metadata_fields: "status deleted container_format min_ram updated_at min_disk is_public size checksum created_at disk_format protected instance_host host display_name instance_id instance_type status state user_metadata.stack"
 {%- endif %}
 {%- if ceilometer_collector.amqp_host is defined %}