Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Update all-in-one VM CPUs from 4 to 8

    By testing we found that all-in-one VM needs more CPUs, otherwise
    , we encountered high probability failure during kolla deployment.

    Change-Id: I4ee798c9427c61a696bc8ec33ba4bc72fafcebba
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 629e4d8..5f51dc6 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 629e4d87a2a5be955fcd157b5c98f9f0a40d2116
+Subproject commit 5f51dc664600f8259f5880b1c76ffe5f95292ba2