Update git submodules

* Update docs/submodules/releng from branch 'master'
  to e6e70ebb7b726a09196f101f3c153867f89cc44f
  - Merge "Optimize Functest K8s job filters"
  - Optimize Functest K8s job filters

    Change-Id: I092971c95c85d010ec94cd276a2cbd4f75ff294c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3d2a37c..e6e70eb 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3d2a37c9bb9e9bfcf2c69f8dba4f957dc44ae936
+Subproject commit e6e70ebb7b726a09196f101f3c153867f89cc44f