Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Merge "Create a router in both vping scenarii" into stable/euphrates
  - Create a router in both vping scenarii

    It fixes vping_userdata as it allows getting metadata due to the
    gateway defined for the subnet.

    It could be noted that DHCP can add the route needed if no gateway is
    defined and if force_metadata is set in dhcp_agent.ini.

    Change-Id: Ia62e0f00e3d2caee6262dd9cd9966d1f21fe40d5
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit a691a8c2868d3f8af531e0bff513023c3a704aaf)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b9745b8..bce23e6 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b9745b8a5e2fe6400a68372eee8f7b442206fe5f
+Subproject commit bce23e6c880c65cd307bc43d84ebbe4f9a7a8be8