Update git submodules

* Update docs/submodules/sfc from branch 'stable/euphrates'
  - Remove SFs from security groups

    Having the SFs port in security groups delays packets artifically in the tests
    Besides, the netvirt guys suggested not to do it because it might be confusing
    for ODL in some situations and it is not a 'suitable construct'

    Tests without security groups show indeed a better behaviour

    Change-Id: I33281215cd2e80804c8f09ca201c046f590249ab
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 5a1ec01..edf1b61 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 5a1ec01f3d560ea68cbe811a98529920af7ee684
+Subproject commit edf1b61b0cbd33d39ffcfea19592b9555ab1020b