Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [maas] Adjust deployment order/timeouts

    Change-Id: I9dbb51ce2387450e4ae19f8b3444f5e52cfdc71d
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 5ed31a0..52bd5a8 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 5ed31a007826052a723cb573f7ed49a7473699f6
+Subproject commit 52bd5a8f6c5b27ec3070625a51aea8ff85f5a8db