Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Update test_vnf.py to support py3"
  - Update test_vnf.py to support py3

    Change-Id: I86dc83b1fc9205f7b8209d63e18439a7e05c646b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 54be27c..a32ee34 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 54be27caf1ec50c0b76409b009d3dbcb894f0aca
+Subproject commit a32ee348efa6d5858cef97294a94d85bce63d456