Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - patches: seedng: module: Sync salt version

    JIRA: FUEL-282

    Change-Id: I6c86ce0b1113ca674b1756e7997559eee90a4e5f
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 4003dfc..7fb1944 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 4003dfc1ff62edc587f83aa54cd9eb3fd0347635
+Subproject commit 7fb1944d93e16365acd0792069b1229fc5964670