Update git submodules

* Update docs/submodules/sfc from branch 'stable/euphrates'
  - Fix defaultbranch in .gitreview

    Change-Id: I151ab12fd3a8c47f1efe098d532a5fce7149940a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index ed3a1e7..7f9b0c2 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit ed3a1e7cc27be7d9aa8c7e0eff483b1a4f4b698c
+Subproject commit 7f9b0c2a4a85479d1458e9fb07a4c5961307b9c2