Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Handle vlan package to avoid downgrade

    Change-Id: Ic81507f3f7b3fec593b507e0c534434e8489b01b
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit ceedb354822eb672fdde6d63d49cbe2f05f29cdb)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index e708686..0f9d744 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit e708686d0d6727feca64609ed5ff8e2328c0b5f5
+Subproject commit 0f9d744587a3ebf37b9f84a7ef73d9433961d317