Set Neutron logs Timestamp based on time record field

 - Fix issue with milliseconds in logs shiped to elastic.

Related-bug: PROD-36383
Change-Id: I9f7477e27134bc796ef2207a2a0fe32df82a93d4
diff --git a/neutron/meta/fluentd.yml b/neutron/meta/fluentd.yml
index 92ef2eb..279e789 100644
--- a/neutron/meta/fluentd.yml
+++ b/neutron/meta/fluentd.yml
@@ -31,6 +31,8 @@
                 value: ${ record['message'] }
               - name: python_module
                 value: ${ record['name'] }
+              - name: Timestamp
+                value: ${ DateTime.parse(record['time']).strftime('%Y-%m-%dT%H:%M:%S.%N%z') }
           parse_http_stats:
             tag: openstack.neutron
             type: parser