Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Remove glance_utils as we don't use it anymore

    Change-Id: I44d0dd4fdabd38f09e6113c28668f11a40c6ba86
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 39e1f4d..1fbd7bf 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 39e1f4dba0bc9e6bd1c3bd43b7077c6745635e0c
+Subproject commit 1fbd7bfcf3af86719721add8b8ca1f04dc0beb48