Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Change Bottlenecks Tests Sequence"
  - Change Bottlenecks Tests Sequence

    Bottlenecks ping test case could exhaust the system.
    As a result, tests runned after this one probably get failed.
    So this patch is to move this test at the bottom of tests list

    Change-Id: Ief8af01c6dc7b6f5cb60e568d6239ee7901ad89c
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5adb59e..d5615b3 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5adb59ee2860dd5b3e15fdc8b7a32de2f9010b2b
+Subproject commit d5615b3d3fa6723e6f8f584e4ea47e3dc1693569