Implement "kill" operation using python method os.kill()

[Rodolfo Alonso]

Implement "kill" operation using python method os.kill(), instead of spawning a shell command executing "kill".

[Bernard Cafarelli (bcafarel)]

Exemple of bug that would benefit from this: https://bugs.launchpad.net/neutron/+bug/1843418
Getting kill() error codes will be much nicer than shell spawn+root+parsing error message string

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/681671

[OpenStack Infra (hudson-openstack)]

Change abandoned by Rodolfo Alonso Hernandez (<email address hidden>) on branch: master
Review: https://review.opendev.org/681671
Reason: I've been testing this patch for a long time and I don't know why os.kill(), sometimes, acts like a blocking method. We can't use it if we don't rely on it.

I'll investigate the behavior of os.kill() before proposing again this patch.

I'll take care of the abandoned patches in favor of this one.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 18.0.0.0rc1 release candidate.

[Rodolfo Alonso (rodolfo-alonso-hernandez)]

Bug closed due to lack of activity, please feel free to reopen if needed.