Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "hide cas ticket from web portal"
  - hide cas ticket from web portal

    In the previous implementation, when login the url will shown as:
    http://localhost:8000/?ticket=ST-5WzYs6SD2A#/
    this patch aims to hide the ticket mechanism.

    1) add /api/v1/auth/signin_return to process login verify
    2) refactor code, leverage SignBaseHanlder() to manage casclient

    Change-Id: I62e23eb69ee52304c30753e861b4f0a4e0d45541
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1a0bb35..0f45e69 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1a0bb353fb9bea009efed9c0f3863cee35949b58
+Subproject commit 0f45e69f0795b38a9be054a78caa5b6204ada076