Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Remove all Pike config

    Due to the lack of developers, we will only support one version of
    openstack (master). Therefore, we remove the Pike support which is
    anyway not the latest stable anymore

    Change-Id: Ib2c81f952b0e35c61a3edeb9b4e389f5cd27e956
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 5a47cb1..6b95636 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 5a47cb1e792b6972330f55c60f96814e9975cf23
+Subproject commit 6b956361494a573dfcd7e1440b8183e77be94ee4