When trying to install nova chart with Ceph enabled, libvirtd pod isn't
starting. It's because container is executing virsh commands before
libvirtd process is up. _libvirt.sh.tpl script needs to be fixed to
start the process first and then execute the commands.
Closes-Bug: #1691384
Change-Id: Icd5f31a5fbeb5985ed19213aeb236a25f600b18c