Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - 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>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 4b63bd0..24d9cdd 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 4b63bd0ea961d06723b277b874168c2aaddb96c5
+Subproject commit 24d9cdd384635d8c1a037d6341d63a9c9be039b1