Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[patch] Group APT calls for salt formula install" into stable/euphrates
  - [patch] Group APT calls for salt formula install

    When installing salt-formula-* on cfg01, we used to call APT for
    each package. Instead, handle them all at once.

    While at it, stop using colored output on terminals that don't
    support it (e.g. 'vt220' used by OPNFV Jenkins).

    Change-Id: Ib8f2cee9638c43cdf648487bf05b07cd49802d3e
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit e1325bf5c526f063e7e16326ad6bfdd1c44d5fec)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 9b836d5..89a9364 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 9b836d5ac09646319dbd81eff7222186598218a3
+Subproject commit 89a9364ba44c64a6489eb90878f3ed717e5fe232