Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Catch expected failures

    * neutron on computes (dpdk case: void state)
    * mongodb server (incomplete initialization)

    Change-Id: I3dd3266b5c2d1b155981f725e15742cd38ed899d
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit 24d9cdd384635d8c1a037d6341d63a9c9be039b1)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index c132eb1..79379e8 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit c132eb192e4c2b49dc37a6d9f22dfd86caa3ddbd
+Subproject commit 79379e83773f17aefe65cbcfa9dbc70146d37984