Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "bugfix: query doesn't work well with period=1"
  - bugfix: query doesn't work well with period=1

    when querying by date, if $lt is not provided,
    the empty/None/null/'' results will also be returned,
    the patch aims to fix this issue by adding
    $lt = datetime.now() if not provided

    JIRA: RELENG-212

    Change-Id: Ida1e7d386a88d4ab640441df161c1fe134593f82
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>