Update git submodules

* Update docs/submodules/releng from branch 'master'
  to ab244ae7746a6a6d01d6abb7028a2a0c36c5c43a
  - Revert "Create Stable Branch Jobs for stor4nfv"

    This reverts commit d76a85d831af6be5af63ec190b76e59ffcf4836e.
    It has been created by and external script instead of the PTL.

    Change-Id: I4b91411cb1ba471511f44e2606f3c7f5e9a4bee1
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0f678c9..ab244ae 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0f678c93ae5f1de51cebb004061244e9508ee49f
+Subproject commit ab244ae7746a6a6d01d6abb7028a2a0c36c5c43a