Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Update salt formulas versions

    Change-Id: Id2f93d0274b102a5eef5271a6d15cb91428d7a0c
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 25bf730..2dde16c 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 25bf7306d1d6f66a034c1a60037c0f9b7342c0ac
+Subproject commit 2dde16ca1276a4982602dd303c5cf6d6324daa6f