Update git submodules

Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Support build with extent tag"
  - Support build with extent tag

    Kolla offcial image tag is, for example, 4.0.2. Daisy images can
    be names as 4.0.2.n And Kolla supports upgrading not only from
    4.0.2 to 4.0.3, but also from 4.0.2 to 4.0.2.n. It is a convenient
    way for Daisy to publish its own small changes into images for
    upgrading.

    Change-Id: I9d283e1ffa452ac3e04046ab6c96d018d42e0bf9
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>