Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Sort config.yml correctly and correct vnfd names

    JIRA: SFC-116

    It is confusing that our test-1 is in the second position of config.yaml
    and that it uses test2-vnfd instead of test-vnfd

    Change-Id: Iffd22f295630bce0ce854d4876c1478c56690cfa
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 7d3d673..78188ec 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 7d3d673882b2fcf368c17b18fa1657ce547cf53a
+Subproject commit 78188ec8d971e8ed7d649b58df66082926536dac