Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: fix clean cmds in deploy

    Change-Id: I7da324903df1cc0c26cfba4433748dab459bbeb1
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f973b2d..7eb4f21 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f973b2d3dd421c520c8f91af17b09c88850b08e7
+Subproject commit 7eb4f218222da336cb460deeffcf3cb6e39e9d07