Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Bugfix: Permission denied when fetching Apex id_rsa file

    JIRA: DOVETAIL-472

    It's permission denied When copy id_rsa file from Apex undercloud.
    Add sudo to the scp operation.

    Change-Id: I97bd8a74c406269d066dcde36978c17aa3ce6be2
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index cb8ed91..054cc9c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit cb8ed91ec5941bfc4b5084be4519d828d09ca1ed
+Subproject commit 054cc9c27668ccd18d970ee0c88138178301478b