Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Change the owner of created image dir

    The directory created by SUDO cannot be cleaned by jenkins.

    https://build.opnfv.org/ci/job/daisy-kolla-build-master/31/

    Change-Id: I02f11d72a80e173f7fef9d3b875f95c2d7b4f626
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 0670fed..28e00b0 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 0670fed39189911eaf3372574bb0ecb56e2ce67a
+Subproject commit 28e00b07abf318b17cb681cdac862437c54ed7c8