Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 2258bf4966ebba11e9ae16689af15c055eabc9d1
  - Revert all gsutil debugs

    It reverts the next two changes (the jenkins misconfigrations are
    bypassed):
    https://gerrit.opnfv.org/gerrit/c/releng/+/68792
    https://gerrit.opnfv.org/gerrit/c/releng/+/68793

    Change-Id: Id85c6fac76d02fcbc9cf21d1f8703afb1fc9c6aa
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1478e50..2258bf4 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1478e5094c7d0d98445d76cfbf3bbdaaa0484ec5
+Subproject commit 2258bf4966ebba11e9ae16689af15c055eabc9d1