Comment 4 for bug 1376128

Reviewed: https://review.openstack.org/125349
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=20dbbab61c1159a3dc6ef838ec65b04f7e9cf560
Submitter: Jenkins
Branch: master

commit 20dbbab61c1159a3dc6ef838ec65b04f7e9cf560
Author: Miguel Angel Ajo <email address hidden>
Date: Wed Oct 1 15:16:19 2014 +0200

    Fix pid file location to avoid I->J changes that break metadata

    Changes in commit 7f8ae630b87392193974dd9cb198c1165cdec93b moved
    pid files handled by agent/linux/external_process.py from
    $state_path/external/<uuid>.pid to $state_path/external/<uuid>/pid
    that breaks the neutron-ns-metadata-proxy respawn after upgrades
    becase the l3 or dhcp agent can't find the old pid file so
    they try to start a new neutron-ns-metadata-proxy which won't
    succeed, because the old one is holding the port already.

    Closes-Bug: #1376128
    Change-Id: Id166ec8e508aaab8eea35d89d010a5a0b7fdba1f