Update git submodules

* Update docs/submodules/sfc from branch 'stable/danube'
  - Rename the sfc_one_chain_two_service_functions..

    We use topology shuffling for the execution of testcases
    so is meaningless to specify an exact topology in the
    testcase's file name

    Change-Id: I6fc7b3b2a72017fe501a022dca001c5bc7761acc
    Signed-off-by: Dimitrios Markou <mardim@intracom-telecom.com>
    (cherry picked from commit ff5710c3d39cf5124a00ad329aeae1d483a803a2)

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 6874713..0c355b4 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 6874713393683d3760a7df5aaed665456ff8db4c
+Subproject commit 0c355b40f1b523a24277bfed01fd9da82747aac4