heat can not cleanup dead engine if updated_at is None

[Ethan Lynn]

+--------------------------+-------------+--------------------------------------+--------------------------+--------+----------------------------+--------+
| hostname | binary | engine_id | host | topic | updated_at | status |
+--------------------------+-------------+--------------------------------------+--------------------------+--------+----------------------------+--------+
| vs404.rch.kstart.ibm.com | heat-engine | 380df4e7-dbca-4390-884f-ea78fd73f6a2 | vs404.rch.kstart.ibm.com | engine | 2015-05-28T18:41:18.291954 | up |
| vs404.rch.kstart.ibm.com | heat-engine | ce38977b-9286-4ff0-a0d6-533df6f14e14 | vs404.rch.kstart.ibm.com | engine | 2015-05-28T18:41:18.401968 | up |
| vs409.rch.kstart.ibm.com | heat-engine | 2a435bb8-37ec-4db5-b4a6-2c5f27e54c99 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | 699b7b96-0af2-4086-9402-420ef59ee7dd | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | 6bbfba35-cc76-4186-964f-b2b8df6c4664 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | 734b247e-444c-497e-a3a0-da7e0b3df302 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | 98164dde-8c4b-43a4-89ca-552ab0e07bd0 | vs409.rch.kstart.ibm.com | engine | 2015-05-28T18:41:25.814769 | up |
| vs409.rch.kstart.ibm.com | heat-engine | 98f5cc65-31ee-4a13-be61-2b9b19d42d66 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | a4e6c253-da84-40cb-9c1a-eeab187fe9b1 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | b102ad38-5212-4354-89ca-6742aff55b70 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs409.rch.kstart.ibm.com | heat-engine | d3106854-3c7b-41a5-b1e3-2f9e0b98bca5 | vs409.rch.kstart.ibm.com | engine | 2015-05-28T18:41:25.748637 | up |
| vs409.rch.kstart.ibm.com | heat-engine | f6158f12-6b10-43e2-8d64-a913da8a2317 | vs409.rch.kstart.ibm.com | engine | None | down |
| vs425.rch.kstart.ibm.com | heat-engine | 629cc27a-8641-405b-932c-25bdc7f5342c | vs425.rch.kstart.ibm.com | engine | 2015-05-28T18:41:20.690532 | up |
| vs425.rch.kstart.ibm.com | heat-engine | 65efc561-70e1-458a-8fb3-8ac74088844a | vs425.rch.kstart.ibm.com | engine | 2015-05-28T18:41:20.817643 | up |
+--------------------------+-------------+--------------------------------------+--------------------------+--------+----------------------------+--

If updated_at column is None, then this dead engine can not be remove from service-list.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/187043

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/187043
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=4b9c2caf3b7b44a66b472acae8198c188acba377
Submitter: Jenkins
Branch: master

commit 4b9c2caf3b7b44a66b472acae8198c188acba377
Author: Ethan Lynn <email address hidden>
Date: Sun May 31 18:45:46 2015 +0800

    Report status when engine start

    After heat engine starts, it won't report its status, so
    updated_at is None by then. If heat engine die before its first
    status report, its record will not remove from service-list.

    Change-Id: I55801ceb12ec8e4a3746799d3d43c6e9c01c6cd8
    Closes-Bug: #1459997

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/kilo
Review: https://review.openstack.org/187104

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/187104
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=be9af2811ce72c55da322f240364e99e02cd5471
Submitter: Jenkins
Branch: stable/kilo

commit be9af2811ce72c55da322f240364e99e02cd5471
Author: Ethan Lynn <email address hidden>
Date: Sun May 31 18:45:46 2015 +0800

    Report status when engine start

    After heat engine starts, it won't report its status, so
    updated_at is None by then. If heat engine die before its first
    status report, its record will not remove from service-list.

    Change-Id: I55801ceb12ec8e4a3746799d3d43c6e9c01c6cd8
    Closes-Bug: #1459997
    (cherry picked from commit 4b9c2caf3b7b44a66b472acae8198c188acba377)