Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "create data disk for each node in virtual deploy"
  - create data disk for each node in virtual deploy

    Since the roles are assigned randomly now, data disk should be created
    for every node.

    Change-Id: Idd12191033844dad58676de65df0fbc99a51cfbc
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index ca38f70..eef7d55 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit ca38f70ab8d7d91190f9d0a9ec2c84e804883f1c
+Subproject commit eef7d5543504f1645c656d0e2c37fed731e91a96