Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Skip recreate Daisy server VM if it exists in python"
  - Skip recreate Daisy server VM if it exists in python

    Do not recreate daisy server if it exists.
    Reference to the bash code in patch [1].

    [1] https://gerrit.opnfv.org/gerrit/#/c/40337/

    Change-Id: If472c59ea180e550f358af4a3a9c7b42e575eddc
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index dfbb34b..5fe7c28 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit dfbb34be04adcb3166629c7c38d4a1769333c587
+Subproject commit 5fe7c289c0588ace681979138a20dc893ee64831