Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Take all cmd status into account in juju_epc"
  - Take all cmd status into account in juju_epc

    It also puts output in functest.log instead of /dev/stdout.

    Change-Id: I3a4b5f81edd20a529821c5a684b3ab269b7c6796
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 837ba74..6108496 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 837ba74895359e5dc85aa7c5c9c8496c0fa3af62
+Subproject commit 6108496e34d3b875d99cfbb67bd93e32a9b406ec