admin/data-center: finish 3.6.3, 3.6.4, 3.6.5

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
admin/data-center: Add TODO in this document

余下一点点权限部分的内容我不准备写了, 熟悉的同事花几分钟就
可以搞定了.

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