Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Bug fix: Deletion testcase only uses one VNF

    We are only using one vnf but there are two defined in the config for
    that testcase

    Change-Id: Ifa86c2e48cb60edcd1b173eee14715c3787a9889
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 4d26d88..ecd8d7c 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 4d26d88cd9baeaf35084ab59528223692ad6df25
+Subproject commit ecd8d7c0fd1683497e2c2a19199c7becb0b87e6e