Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "Clean up aodh formula symlink"
  - Clean up aodh formula symlink

    Change-Id: I1d84b5d4e3eb0de1c3ebf6fc5a538ee6714d53b2
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 00872d7..5f0ac89 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 00872d71aba2ac8b8ca7c7c7a5adfd74e8f60d95
+Subproject commit 5f0ac8951f2630642f05dd6d06c414a9402db954