Add libvirt API acl test case for virsh vol-resize

Update virsh vol-resize test case for test API 'resize' in
virStorageVolPtr set.

Signed-off-by: Wayne Sun <gsun@redhat.com>
Add libvirt API acl test case for virsh vol-download and vol-upload

Update virsh vol_download_upload test case for test API 'data-write'
and 'data-read' in virStorageVolPtr set.

Signed-off-by: Wayne Sun <gsun@redhat.com>