Add option to remove networks from dead dhcp agents

[Eugene Nikanorov]

Allow alive agents to pick up unhosted networks in case dead agent stops serving it.

[Sudhakar Gariganti (sudhakar-gariganti)]

Isn't this bug already covered under https://bugs.launchpad.net/neutron/+bug/1174591 ?
Kevin's patch( https://review.openstack.org/#/c/110893/ ) handled the l3 agent part of it. Your patch is now handling dhcp-agent.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/131150
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=0db17ea6ece6ce3135034052bb974226074302b6
Submitter: Jenkins
Branch: master

commit 0db17ea6ece6ce3135034052bb974226074302b6
Author: Eugene Nikanorov <email address hidden>
Date: Fri Oct 24 17:39:01 2014 +0400

    Add option to remove networks from dead DHCP agents

    Networks are removed from dead agents after a certain
    configurable time.
    Then unhosted networks could be picked up by alive DHCP agents.

    The feature is added for all plugins that support DHCP scheduling

    DocImpact
    Change-Id: I6ab03b1642f54aa1d5de8844d95c758f1cb273f1
    Closes-Bug: #1386794