Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: fixes naming for fdio dvr scenarios

    Change-Id: I1d01d9d4a72946b4998437972ae12083675e7e79
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index fb23c3c..e6cd3c6 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit fb23c3ca2ed8f6fd1f3e7f9f5c35a8a9cb81852f
+Subproject commit e6cd3c6c77d2aaf6cb7d6765edb5baf9bc50bcf7