Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Clean the default security group

    It's not removed when deleting the users and the projects.

    Change-Id: Ib5de0885dcbfb558a48cdd20ae3ccc47b7f23748
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 17e87d5..d4e60af 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 17e87d5af713bb07759c4b2af0c2b40077343a32
+Subproject commit d4e60af2b8f544d774223b16c193dc40bd5dce38