Update git submodules

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

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 77609e7..2469280 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 77609e7fcebc76f4e10a133354787ad5086c0450
+Subproject commit 246928006daf99de2317dc8d171c2b0735a3c605