Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Compass: add retrieving OS credentials for Containers"
  - Compass: add retrieving OS credentials for Containers

    Compass has changed the mechanism of deployment (Containers) in master,
    so we adjust the way to fetch the OS credentials file.

    Change-Id: If126ac9b081589c21466b59eae05b107bf6dc425
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b88663f..7da2325 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b88663f5b37641bd88b13c89f1964079bc231e8a
+Subproject commit 7da23259c30038ff2f69c36b2c7117e2d69820f1