Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Stop setting ext net in config"
  - Stop setting ext net in config

    It simply relies on the related env var as expected.

    Change-Id: Ibbb1a2ab2cccdff8cafe6f409af383a24778b1f5
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 359ca83..7686014 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 359ca83f394748b258980d9fd827e42cdb0d6e2b
+Subproject commit 768601416d408f8596f6d86f9abadbe13cf19c72