Update git submodules

* Update docs/submodules/sfc from branch 'stable/euphrates'
  - Modify the list of working topologies

    After testing, there are three topologies which work and three topologies which
    do not work because of bugs in OVS and ODL. We remove those two from the
    testing in 5.0.0

    Change-Id: I576768978bfa763725027239081686c95408eef4
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index babaf3f..9e48466 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit babaf3f1f785022191edf3d0ea1c2727b9856c91
+Subproject commit 9e484669d45e687dde4d422971e47ac5f19069ae