Update git submodules

* Update docs/submodules/ovno from branch 'stable/euphrates'
  - Whitespace

    Change-Id: I9dc2d7160d4e231729a531325ff394a6244ac24d
    Signed-off-by: Stuart Mackie <wsmackie@juniper.net>
    (cherry picked from commit 12a817571140fcb2531112b894ad37fbfffd44c6)

diff --git a/docs/submodules/ovno b/docs/submodules/ovno
index 6d1c549..f49eab0 160000 (submodule)
--- a/docs/submodules/ovno
+++ b/docs/submodules/ovno
@@ -1 +1 @@
-Subproject commit 6d1c5491ffc6dd72c6a93083a5aaba29378e9a72
+Subproject commit f49eab063a13bb89bd90f583bd6d814c3a7d21d2