Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[dovetail] Add TESTAREA to support run mandatory or optional test cases"
  - [dovetail] Add TESTAREA to support run mandatory or optional test cases

    JIRA: DOVETAIL-694

    Change-Id: I4d2f4342bb10b5199c0dd1ed6ee579df14cb1517
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 36a9f47..91669b3 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 36a9f477a6b25c7bf1aa64e38b0df90316a73161
+Subproject commit 91669b39a0a6023cee20578f49efe6e633738b06