Update git submodules

* Update docs/submodules/releng from branch 'master'
  to e8f410144cc0169cdf467cad315c07390e51b47d
  - Revert "Run tests in parallel"

    This reverts commit 99e573472d7085541cc5c01da1b02dfec2f4fa21.

    Change-Id: I42eda94cca942ce2af2c3ba6b1e45def918c9813
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 99e5734..e8f4101 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 99e573472d7085541cc5c01da1b02dfec2f4fa21
+Subproject commit e8f410144cc0169cdf467cad315c07390e51b47d