Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "run Functest daily in xci"
  - run Functest daily in xci

    Functest daily is based on the functest alpine dockers:
     - healthcheck
     - smoke
     - features
     - vnf

    Change-Id: I922f3a5946e8bc06229fb03a959abd2bfead132b
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 641e492..9e686da 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 641e4920bec46a77d8e3d3bfcd1dd4f9f9ac512f
+Subproject commit 9e686dafc73f390c13ca05bbeea7f7729aa57f38