Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 9d93c87f59dd97c5cbd44f6b75e6a45bd0fe97eb
  - Slightly update the classical Functest jobs

    It leverages latest XtestingCI changes.

    Change-Id: I18edf6d08ad838bfec4c0f8439b9314177e1f061
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2ee35bc..9d93c87 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2ee35bc654a3f17a0bf5db2d8a7f447ef1c0bde6
+Subproject commit 9d93c87f59dd97c5cbd44f6b75e6a45bd0fe97eb