Don't use deprecated nova libvirt conf names

libvirt_cpu_mode was renamed to libvirt.cpu_mode
libvirt_type was renamed to libvirt.virt_type

This patch is needed before I346ee0248c03e60716bd7dc4a5ee4493610867cb can
land.

Change-Id: Ie8a39147ece3a3c86f4b146fa0af3641b1079319
Add "daemon" flag to marconi script

This patch adds daemon flag to marconi script. This change was
needed to run the latest build of marconi-server in background.
Since mongodb can not be used with marconi until gate is updated
to Ubuntu 14.04, we are changing our backend to sqlite.

Change-Id: I1a4148bd545818d5e943257be2f6e752ce43f793
Merge "Add "daemon" flag to marconi script"
Merge "Don't use deprecated nova libvirt conf names"
Merge branch 'master' of github.com:openstack-dev/devstack