Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [compass4nfv] add nosdn-bar-noha scenario

    Change-Id: I5a513e143aff0775d066532af14165c4509aa82e
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 238fe1b..6bfe687 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 238fe1bced27354a9f1c2553dd09ce7739a33b34
+Subproject commit 6bfe687fbd6dcf57a9096a4ea356ef98561d3d18