Update git submodules

* Update docs/submodules/fuel from branch 'stable/fraser'
  - Mend OVN scenario

    * setup HWE kernel to get suitable conntrack module
    * clean out outdated state with ovn ctl options
    * point SB remote source to local mgmt network

    Change-Id: I8986c227ce0a9a3b7ab3faf382760ec32e6e7c00
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit 26ca4c20b57564117087e2c649e10d71477a134f)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index d458419..7056a8c 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit d45841926790df8313912697d31753c120e2c4aa
+Subproject commit 7056a8c5379b34bab3dd2b7cf8ca5c91656cb629