Update git submodules

* Update docs/submodules/functest from branch 'stable/gambia'
  - Remove fds from Functest jjbs

    Fds doesn't participate to Gambia.

    Change-Id: I8bf4da40caee572442a23d67036755a8746dcae5
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b7f9b53..26137f2 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b7f9b53a34cd8ffcc9df4d2f286e55e13adb4a58
+Subproject commit 26137f2765533a0df2f330fc78634866897abf20