Update git submodules

* Update docs/submodules/releng from branch 'master'
  to b414adf86db84a994f8e2a0ea9c8960cc9565f12
  - Revert to opnfv-build

    Change-Id: I4d83f27a78f8365a1a2f72437929f1468b94c017
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b30c0d5..b414adf 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b30c0d5f9c2983d86660018bbcb59ac955126a3b
+Subproject commit b414adf86db84a994f8e2a0ea9c8960cc9565f12