dhcp agent doesn't support client identifier option

[Moshe Levi]

according to the dnsmasq man ( http://linux.die.net/man/8/dnsmasq)
client id should be written to dhcp-hostsfile,
[<hwaddr>][,id:<client_id>|*][,net:<netid>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
but in current implementation all the option are written to dhcp-optsfile

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/176256

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/176256
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=d4a39439727055fed2cc0661f1ba02c73fd523dc
Submitter: Jenkins
Branch: master

commit d4a39439727055fed2cc0661f1ba02c73fd523dc
Author: Moshe Levi <email address hidden>
Date: Wed Apr 22 14:17:28 2015 +0300

    Add client id option support to dhcp agent

    According to the dnsmasq man client id option should be
    written to dhcp-hostsfile and not to the dhcp-optsfile.
    Also this patch update the dhcp_release command to take
    into account the client id when releasing old leases.

    Closes-Bug: #1447105

    Change-Id: I6f11b12040ad4e00ae871be45edda3b52b4ee0da

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: neutron-pecan
Review: https://review.openstack.org/185072