Fix libvirt group selection in live migration test
Fix libvirt group selection in live migration test

The custom start scripting for the nova compute service assumed that the
libvirt group is "libvirtd". Unforately libvirtd is no longer used by
debuntu as they use "libvirt". Add a simple check against /etc/group
for an existing libvirtd user otherwise use libvirt.

Change-Id: Idbda49587f3b62a0870d10817291205bde0e821e
Depends-On: If2dbc53d082fea779448998ea12b821bd037a14e

klmitch/nova,mikalstill/nova,mikalstill/nova,klmitch/nova,jianghuaw/nova,mikalstill/nova,vmturbo/nova,phenoxim/nova,rajalokan/nova,Juniper/nova,gooddata/openstack-nova,openstack/nova,vmturbo/nova,rajalokan/nova,mahak/nova,Juniper/nova,mahak/nova,gooddata/openstack-nova,openstack/nova,rahulunair/nova,jianghuaw/nova,gooddata/openstack-nova,jianghuaw/nova,openstack/nova,rahulunair/nova,klmitch/nova,rahulunair/nova,rajalokan/nova,klmitch/nova,gooddata/openstack-nova,vmturbo/nova,Juniper/nova,rajalokan/nova,Juniper/nova,phenoxim/nova,jianghuaw/nova,vmturbo/nova,mahak/nova