Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Add test case run command introduction

    JIRA: BOTTLENECK-158

    Print testcase run command to ease reading log

    Change-Id: I41362349d23865d0a485d80856cbbc4658ee945a
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 432d390..d429186 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 432d3902c671880425af81c9b4bf00b3a794d547
+Subproject commit d4291866c5b1016adcd1b83d47968bdf714698de