Comment 10 for bug 1578982

Reviewed: https://review.opencontrail.org/19986
Committed: http://github.org/Juniper/contrail-controller/commit/066eb790c02a778b824779229be25d356d697467
Submitter: Zuul
Branch: master

commit 066eb790c02a778b824779229be25d356d697467
Author: ashoksingh <email address hidden>
Date: Sun May 8 17:17:28 2016 +0530

Send teardown time in FlowLog messages.

If a Flow Log message is exported for a flow, ensure that
flow teardown time is also sent in subsequent exports. If we
encounter a flow-sample with teardown time for a flow which was
never exported, then subject it sampling just like other flows.

Also treat -1 value for flow-export-rate as disabling of sampling.

Closes-Bug: #1578982
(cherry picked from commit 95e51e84b65a41a7aa20a14edd3bcf9fec0524b8)

Change-Id: Ifed2679107cb47458edb46688c3c8bdf26a3a12d