implement debug mode for libvirtd
implement debug mode for libvirtd

If CONFIG_DEBUG_MODE=y, this sets up the elevated log levels suggested
by Daniel Berrange in:

http://lists.openstack.org/pipermail/openstack-dev/2014-January/024414.html

Change-Id: I8583a1184924fcdf469b80ed625b1286a48c58a4
Resolves: rhbz#1061753

imcsk8/packstack,imcsk8/packstack,fr34k8/packstack,imcsk8/packstack,mahak/packstack,xbezdick/packstack,stackforge/packstack,xbezdick/packstack,mahak/packstack,stackforge/packstack,fr34k8/packstack,openstack/packstack,mahak/packstack,xbezdick/packstack,fr34k8/packstack,openstack/packstack,stackforge/packstack,openstack/packstack