Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Changes default verify scenario to nosdn

    Basically we are getting blocked on merging patches due to ODL breaking
    and these patches have nothing to do with ODL. So we are changing the
    default sceanrio to just be nosdn, and then if the change is relatd to
    ODL we can include an ODL gate run.

    Change-Id: I61ec224e62e6f3cb6ee40696326bf243788c27d6
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1b86f3d..e20fc53 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1b86f3d96c060ac292a49be27480353e84aee803
+Subproject commit e20fc538ed2fd242d0db1518289e6be4a2829681