XenAPI: Fix deprecated config options

I346ee0248c03e60716bd7dc4a5ee4493610867cb broke the XenServer CI as
devstack was still setting the deprecated config options.

Change-Id: Icd84212e97a9d5e007745be8096fa552bc23cb6f
convert devstack from awk to outfilter

The complexity of the awk script was pretty high, and it would
be good to do it in summaries as well, which starts to get a bit
squirelly. Instead bring over the outfilter.py from grenade and
use it for the timestamping.

Any additional overhead from python should be offset from not
shelling out to date on every line of output.

Change-Id: Ic2b86ddba3e7f6520a0fd35599b01143936c6deb
Merge "XenAPI: Fix deprecated config options"
Merge "convert devstack from awk to outfilter"
Merge branch 'master' of https://github.com/openstack-dev/devstack