Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: fixes dpdk jobs with ODL

    Change-Id: I9c33e6661b2dce1b0e5a77d3ed47bf7eebd3bb2c
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2a8f4bd..c2edb31 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2a8f4bd6f17802d530a9578e612bb8e951aa7353
+Subproject commit c2edb31c7198fec681d305cb0e099c5352b4e18b