Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Bug fix: allows searching vnfd_id based on name

    It is currently impossible to obtain the vnfd_id based on the vnfd_name when
    we want to create the vnffg

    Change-Id: Ib7752156db43d76c24f8c6c2803eb7dbc5bbe1d8
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 40344ff..2aa0c27 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 40344ff1e6a616a97cd1eb2afcc767699a576dc1
+Subproject commit 2aa0c27a5d4b0b0d31a9cc0c9dc07321538860f0