Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Export more SDN related env vars for Functest

    Jira: DAISY-80

    Change-Id: Iac3a60570fedef823a8e382d9a04f802ed86e37f
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index afb9b05..4536b5b 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit afb9b05fc088fdb60168a2dd25dda90b5d3ab2d3
+Subproject commit 4536b5bf0e6fb149e81a3513adc61a0463602143