Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 0c691d83341e2b3240cc524e437c225e3481b2ef
  - Add tempest_heat_cntt in all gates

    Change-Id: I1f186f5cc68732aedee416619d49085407f5529d
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3e7ab34..0c691d8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3e7ab349e3911c85b1307798f767282c4fc41a5d
+Subproject commit 0c691d83341e2b3240cc524e437c225e3481b2ef