Update git submodules

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

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 989fff4..9b984e9 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 989fff453c339c9bc876ef0ef624edd5759da8e3
+Subproject commit 9b984e9be0ea5e78d111f57e2ea1c156b7b816a4