Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Merge "Provide support for different ODL versions"
  - Provide support for different ODL versions

    We should be able to deploy with different ODL versions if the user defines
    the ODL_VERSION variable when deploying XCI.

    Change-Id: Ied20959116fed19bf4445f1544883ed0dc579dfb
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 77102ae..31177af 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 77102aeec40478c078acb616bf65c9d978572401
+Subproject commit 31177afd6821f65e2601cb2b928624ba8f3d0216