Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Run aodh state one by one

    Apply aodh state in consecutive order to avoid
    a race condition with database synchronization.

    Change-Id: I4684fbeaaba2c9780084e0a64fe6453bccfb67e0
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 6cb5e8e..9cfa752 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 6cb5e8ee2deeda4b08cefe8925078410994d084f
+Subproject commit 9cfa75272ba2fd9abab416db1f22df5989c9959e