function-test/vm-disk: highlight some keyword

由于大部分用例的描述出了一两个单词几乎一样, 为了方便测试,
把这些关键的单词高亮显示.

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
function-test/vm-disk: fix wrong result test for moving disk

The disk belong to vm created from template can be moved from a storage
to another.

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
function-test/vm-disk: fix wrong result test for moving disk

The disk belong to vm created from snapshot can be moved from a storage
to another.

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>