Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - 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>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index e011a3d..ff5710c 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit e011a3d122888444c36fba6ee74b27b955356480
+Subproject commit ff5710c3d39cf5124a00ad329aeae1d483a803a2