RedHat support added.

Signed-off-by: salmank <salmank@plumgrid.com>
Missed variable $libvirt_group for Ubuntu added.

Signed-off-by: salmank <salmank@plumgrid.com>
Notify libvirt service on change in qemu configuration file

Signed-off-by: salmank <salmank@plumgrid.com>
Merge pull request #1 from plumgrid/salmankh-dev

salmankh-dev