Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "leverage tornado framework to simply impl of TestAPI"
  - leverage tornado framework to simply impl of TestAPI

    1) make better use of initialize() method
    2) better naming global arguments

    Change-Id: I89dc72a358bcb2a5688a1ffeb3ed5d735d875a4a
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index aa7d754..a1655f1 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit aa7d754bebbf6b20e6a14609372bf36a9059a269
+Subproject commit a1655f1109920f83d12333ba8e0f6c8f6609535d