Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Ease adding proxies in vms

    It eases running VNFs behind proxies as they download packages.

    Change-Id: I187078dab744c51188b9835417d1a29fad1b4bd6
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 5988d84..d5fce8c 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 5988d84f62cb19abfdddf1475177f174d6c2597d
+Subproject commit d5fce8c12bc73c1b1547df2750563c271a3ab3f6