Update git submodules

* Update docs/submodules/releng from branch 'master'
  to e4e7eeec66f7f34117a13c23a908bf6dec97f95e
  - Clean Obselete jobs

    This will be safely reverted if the projects are active back.

    Change-Id: Ic9155b3d0e0633c5b08df297bf676c05e67d4b45
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9570539..e4e7eee 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 957053910a3b93d5e7dc56a15e68f1a3803a099a
+Subproject commit e4e7eeec66f7f34117a13c23a908bf6dec97f95e