Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Correct functest container with snapshot

    If OS_VERSION is master we want to pull ollivier containers, otherwise
    we can pull OPNFV.

    Change-Id: I6e838a85c6b7918540c8bc3ca2d5e790e5aa7a57
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b237878..01b6e24 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b23787845e719f39d4a48f0581be2019764f73ed
+Subproject commit 01b6e24790816cb0dbe62c3af4551d33bab2dda8