Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: fixes scenario name for netvirt+vpp

    Change-Id: Ie3ca73a09cbea1aaf5c195fe319e5ec46e71f1bf
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 637873b..8efe448 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 637873b739bb486f409a05a630159782866b7c7e
+Subproject commit 8efe44853121774b32960149e8c8323038235d5b