Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Rethink the clean up process

    Using the '--nocleanup' parameter as part of command,
    the cleanup mechanism could be disable.
    Otherwise, the cleanup method is executed even if a exception has been raised.

    Change-Id: I9638369900f599793393feb5184c30b74f1b7c7e
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 77dfb2e..37d5bca 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 77dfb2e6eb0f3c872ec25cc6196d13b5ddfe0a3b
+Subproject commit 37d5bca7cc52709e89d434345560cfe1d90e2e52