Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Temporarily disable py36

    Build servers haven't been updated yet to support py36.

    Change-Id: I6e396f944e7226d682a58c8e74ed136e0b55d2cd
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3ca122e..6c65f82 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3ca122e853d9a5208867d619eb52d99008de39b9
+Subproject commit 6c65f82b3571550229566be3c6b9490741018502