Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [ovn/noha] Simplify net scheme on compute nodes

    Also install OVS 2.9 from UCA repository to get the latest code/fixes.

    Change-Id: I09d6da67d28033bc0e64eef27fffb368d262d7f4
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index bb55bb7..a9ad0da 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit bb55bb795bd8f47598a38d445e0083fb6ca96b50
+Subproject commit a9ad0da2d480a47d83cb26c03574cfdcee84b647