[R3.0-2722]: TCP flows are not deleted as per flow aging configuration

[alok kumar]

now after tcp eviction changes bug https://bugs.launchpad.net/juniperopenstack/+bug/1550759, TCP flows are not deleted after aging timeout.

steps:
- aging timeout configured: 5 sec.
- ssh from any VM to other VM and keep the session active without any traffic.
- corresponding flow should be deleted after 5 sec.

the flow is only getting deleted after 3 mins.

[Ashok Singh (ashoksr)]

Aging configuration should be changed via flow_cache_timeout of contrail-vrouter-agent.conf file. The test-case mentioned in the bug is modifying aging configuration via introspect http://compute:8085/Snh_FlowAgeTimeReq?new_age_time=100. When it is modified via introspect agent updates aging time only for default flow-stats-collector and not for flow-stats-collector created for TCP flows

[alok kumar (kalok)]

hitting this issue only when aging timeout is changed through introspect.
removing blocker tag for now.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/18101
Submitter: Ashok Singh (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/18101
Committed: http://github.org/Juniper/contrail-controller/commit/54becf8482dfcdcc3a2180f4cf4ff348c815bfbc
Submitter: Zuul
Branch: R3.0

commit 54becf8482dfcdcc3a2180f4cf4ff348c815bfbc
Author: Ashok Singh <email address hidden>
Date: Wed Mar 2 02:35:03 2016 -0800

Update Aging time for TCP flow-stats-collector

When aging time is changed via introspect it was updated only for
default flow-stats-collector. We need to update the aging time for
implicitly added TCP flow-stats-collector as well. However this
update should not be done when TCP flow-stats-collector is configured
explicitly via configuration (Protocol based aging config)

Change-Id: Ic83868fbce82c9c5d5070bd3eb669903f23ee147
Closes-Bug: #1551201

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/18213
Submitter: Ashok Singh (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/18213
Committed: http://github.org/Juniper/contrail-controller/commit/257b512b3eb078c9874e7ec370c4685f6593fce8
Submitter: Zuul
Branch: master

commit 257b512b3eb078c9874e7ec370c4685f6593fce8
Author: Ashok Singh <email address hidden>
Date: Wed Mar 2 02:35:03 2016 -0800

Update Aging time for TCP flow-stats-collector

When aging time is changed via introspect it was updated only for
default flow-stats-collector. We need to update the aging time for
implicitly added TCP flow-stats-collector as well. However this
update should not be done when TCP flow-stats-collector is configured
explicitly via configuration (Protocol based aging config)

Closes-Bug: #1551201
(cherry picked from commit 54becf8482dfcdcc3a2180f4cf4ff348c815bfbc)

Change-Id: I91fa0dbce6918ff12ab3c1c436e6f2dec7d0f0f7