Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "merge swagger_base_url with ui_url"
  - merge swagger_base_url with ui_url

    TestAPI used to have only one webpage, which is swagger_ui,
    now a new one webportal is added, and the base url is the same
    (http://testresults.opnfv.org/test)for them both.
    This patch aim to unify the urls.

    Change-Id: I15295975fb05f7e8c8d413e12b2b5c0784f0799a
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 7e42754..bf128df 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 7e427548729365e781ca539b4790b2c96de86f31
+Subproject commit bf128df80f08053c5f049a2161dc12634a070c82