Update git submodules

* Update docs/submodules/sfc from branch 'stable/euphrates'
  - Disable test 2 for 5.0.0 (Euphrates 1.0)

    Test 2 is continuously failing because of tacker missing functionality

    Change-Id: I785e79d78df4bfb9f48e20288e261efff741bcd4
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 12d6def..3e7b534 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 12d6defc7c25e51ad0007d8db3c67cc21cc49ee9
+Subproject commit 3e7b53476aca36210d204e15ba0377f1862b57a3