Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 7d6e0d97b57d3beb87d14c2a720079b382271066
  - Merge "Test XtestingCI in ansible remote mode"
  - Test XtestingCI in ansible remote mode

    Change-Id: I5ec74a6acf4da1e31ee854c791a2480760c08d9c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1ec776e..7d6e0d9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1ec776e0003434909ff34c50562c378b01afa9fc
+Subproject commit 7d6e0d97b57d3beb87d14c2a720079b382271066