Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Fix loop device name

    In [1], ${loopdevice:0:5} is wrong when loopdevice is loop13p1.

    [1] https://build.opnfv.org/ci/job/daisy-kolla-build-master/36/console

    Change-Id: I3bfcf771c8b510f9c5c1f853a1a61a299106d5dc
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 5012c27..560eb13 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 5012c278224472d7964e3e8abd9392c06869ded4
+Subproject commit 560eb13d6468f142d6aaaae78f85bc22a6acc7cf