Update git submodules

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

    Change-Id: I152ac898661a0e99a6232df86689c70c468ceaa5
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit b66827d753e09c29cd6f541119dc0ec4c6344511)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index fb1fafb..a4bbcd8 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit fb1fafba4fa172fffe92d33ed71adaeb866b5c05
+Subproject commit a4bbcd895a0fbf29cb7c2dc396fefb4229573225