Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Apex: Cleanup slave/slave-label configuration"
  - Apex: Cleanup slave/slave-label configuration

    Changes Include:
     - Remove defining 'node:' per job template and use slave-params
       defaults
     - Gate job was using daily/build slave, when it should be using virtual
       slave

    Change-Id: Iec2321801daef1b1fa40724a244bf2f6edf36c6e
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 14601e0..ad4acb5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 14601e08b9147c4705a444815d9d3b142ccc9893
+Subproject commit ad4acb5b5594ad9cbcef870cb115daaf2eb5d82c