virt-libvirt: add configuration for virsh domifstat

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
virt-libvirt: add virsh function for virsh domifstat

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
virt-libvirt: add test for virsh domifstat

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
virt-libvirt: add configuration for virsh domstate

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
virt-libvirt: modify virsh function for virsh domstate

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
virt-libvirt modify libvirt_vm function for virsh domstate

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
virt-libvirt: add test for virsh domstate

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
qemu_vm: Handle failures to get seabios log on RHEL 5

RHEL 5 doesn't use seabios, so we can't use its log
compulsorily, so we need to handle the IndexError
that is thrown in that case.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>