Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 535c9eee14568beffb9832b01736e498b674d0b0
  - Correct volume bindings in functest.yaml

    It also adds -p in run_tests call

    Change-Id: I6e765407ba62678241a9ad2c62fcf0c2ca64e431
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index af1f949..535c9ee 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit af1f949087ec6d682c46822316b2c2ad2c2d7c6c
+Subproject commit 535c9eee14568beffb9832b01736e498b674d0b0