Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Bug fix: Problem with SNAPs integration

    SNAPs changed the API:

    https://github.com/opnfv/snaps/commit/c711acf8ae3e4ad6f746500747857bcc9fd6f7be#diff-0b922a3e087121238d5a8b08ef5b894aR480

    Now we require to pass keystone client to get the neutron port

    Change-Id: I93fa4b127255c1a078aa3644773b7c8b886cea6d
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 41135da..39e1f4d 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 41135da626fe2c2813e58f52928b4e5ba4e47bf7
+Subproject commit 39e1f4dba0bc9e6bd1c3bd43b7077c6745635e0c