Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Print stderr in logs when calling cmd over ssh

    Change-Id: I152ac898661a0e99a6232df86689c70c468ceaa5
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1b75bbb..b66827d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1b75bbbc4e842ca2c8c14957261c88692f9e4828
+Subproject commit b66827d753e09c29cd6f541119dc0ec4c6344511