v2v.tests: Add test for converting remote host's vms.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
utils_v2v: Enhancements to Target and LinuxVMCheck classes.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libvirt.tests: Add test module for v2v with partition pool.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
v2v.tests: Add test module for v2v with lvm pool.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
virttest.utils_v2v: Support libvirtxml for v2v.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
v2v.tests: Add convert local image test module.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>