chen-li 5dbff28062 Update listener stats
1. Add request error count
2. Add root element 'listener' in the API response body

Change-Id: I8beb918c176ed848affa264cb036763240d07dcd
Implements: blueprint stats-support
2016-10-09 21:11:42 -05:00
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2016-10-09 21:11:42 -05:00