replace daemon.pidlockfile with new functions

[Igor Gnatenko]

python-daemon doesn't have pidlockfile since 1.6 (actual version is 2.0.3).

(cd /home/ignatenko/fuel-main/local_mirror/centos && python /home/ignatenko/fuel-main/utils/simple_http_daemon.py 23274 /tmp/simple_http_daemon_23274.pid)
Traceback (most recent call last):
  File "/home/ignatenko/fuel-main/utils/simple_http_daemon.py", line 21, in <module>
    import daemon.pidlockfile
ImportError: No module named pidlockfile

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/147120

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/147120
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=a765460d3fd69089e3b4d2b3a6b55e28e6fb53eb
Submitter: Jenkins
Branch: master

commit a765460d3fd69089e3b4d2b3a6b55e28e6fb53eb
Author: Igor Gnatenko <email address hidden>
Date: Wed Jan 14 14:11:08 2015 +0300

    add support for new python-daemon API

    with saving reverse compatibility

    Change-Id: I628505a449763a8eeee1e627cafd6a8d21427860
    Closes-Bug: #1410735
    Signed-off-by: Igor Gnatenko <email address hidden>

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/6.0
Review: https://review.openstack.org/213712

[Vitaly Sedelnik (vsedelnik)]

Won't Fix for 6.0-updates as there is no customer impact

[OpenStack Infra (hudson-openstack)]

Change abandoned by Tony Breeds (<email address hidden>) on branch: stable/6.0
Review: https://review.openstack.org/213712
Reason: This branch (stable/6.0) is at End Of Life