Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Create VNF user with admin role"
  - Create VNF user with admin role

    Change-Id: I9cdeedd90cacfdae10c498580493106a6cb727fb
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c16361c..cbb6443 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c16361c872858c5d36ac3012bf2df2222eb280cd
+Subproject commit cbb64439160caa48d5725b3ee8be0023103a9ec7