Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Turn Sphinx warnings into errors"
  - Turn Sphinx warnings into errors

    Change-Id: Iefc223a9fa6dbc4e9476aca84b3df4304058862b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index cfe41e1..29e6ba6 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit cfe41e13b6de3c71e963f2bb8cd574c19a84690d
+Subproject commit 29e6ba60bfe1b98fcb31eb8c687c9bf9bd2f44e4