Update git submodules

* Update docs/submodules/ovn4nfv from branch 'stable/euphrates'
  - Update to OVN4NFV Project E release notes.

    Change-Id: I21d73ff27df77d92f18173ff731db1d7914d58b2
    Signed-off-by: Trinath Somanchi <trinath.somanchi@nxp.com>
    (cherry picked from commit ad11455f90078a0e2fefe64b00274cbfae2f44a8)

diff --git a/docs/submodules/ovn4nfv b/docs/submodules/ovn4nfv
index 810bb7f..2c6027f 160000 (submodule)
--- a/docs/submodules/ovn4nfv
+++ b/docs/submodules/ovn4nfv
@@ -1 +1 @@
-Subproject commit 810bb7f5c6615a2d90d9451337e6df6a01702e5b
+Subproject commit 2c6027fb46d1a55f767cc2882d946c794ca5843c