Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[virtual] Apply nova controller state twice" into stable/euphrates
  - [virtual] Apply nova controller state twice

    In order to complete broken database sync run
    nova state on controller one more time.

    Change-Id: I761f26667ebb531b848a62e096f3d79f588d9f24
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit 246928006daf99de2317dc8d171c2b0735a3c605)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 9b5bffe..d42dfd1 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 9b5bffe65199af34cb089c7a782e5e4234610768
+Subproject commit d42dfd19e88e280a8a5f531aab7ae06d4fd413ba