Remove mostly empty directories

The os-apply-config and os-config-applier directories are empty other
than 1 hidden file in each. This appears to be the case just so that
they will exist when the rsync commands run to install the templates
into the image. It's possible the directories won't exist otherwise if
no elements provided any templates.

Instead of using empty directories and hidden files to force them to
exist in git, just check for the existence of each directory before
running the rsync commands.

Change-Id: I0f286a28601c292b5f70258747def36a08d93a87
Create and use libvirtd group for package install

For the nova-kvm package install, we need to create the libvirtd group
and add the nova user to the group. This is because the element now uses
its own libvirtd.conf which is configured to use the libvirtd group.

Change-Id: Ic345b76a17ff75b468da8a493c6bf856d730a586
refresh-completed always failing

99-refresh-completed is always failing for me know.

The review I69d9103b07100f700fb71a2cbbf267042625e7a7 was failing the
non-voting CI but was merged in any ways. This patch tried to put
all the if logic on one line but was too smart for its own good as
kept getting the following error in os-collect-config:

+ curl -X PUT -H Content-Type: --data-binary '{"Status" : "SUCCESS","Reason" : "Configuration Complete","UniqueId" : "i-00000001","Data" : "Finished os-refresh-config."}' 'http://192.0.2.1:8000/v1/waitcondition/arn%3Aopenstack%3Aheat%3A%3A5cb53cbf0dad47cf9fcc4761e79a6a53%3Astacks%2Fundercloud%2F6411748e-ee64-4467-a81f-a4d0e8bb097b%2Fresources%2FnotCompute0CompletionHandle?Timestamp=2014-04-09T14%3A56%3A50Z&SignatureMethod=HmacSHA256&AWSAccessKeyId=50006a08504d41c39402ae0423cab992&SignatureVersion=2&Signature=A89ZrnQr6ZE8caXcn4uDY8sNE%2FbjmcsyXESzaQdG6fg%3D'
<resource>notCompute0CompletionHandle</resource>+ '[' -n '' ']'
[2014-04-09 15:03:23,550] (os-refresh-config) [ERROR] during post-configure phase. [Command '['dib-run-parts', '/opt/stack/os-config-refresh/post-configure.d']' returned non-zero exit status 1]

Change-Id: I0bf2ecfdad299b27b47a27496f9a833efa039206
Merge "Remove mostly empty directories"
Merge "Create and use libvirtd group for package install"
Merge "refresh-completed always failing"