Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - 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 c98abf0..7d3d673 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit c98abf0deb9cb015e70601c4a06b49538467ce0d
+Subproject commit 7d3d673882b2fcf368c17b18fa1657ce547cf53a