Update git submodules

Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Nomination of committer promotion for Taseer Ahmed"
  - Nomination of committer promotion for Taseer Ahmed

    Taseer is one of the active QTIP contributors in Euphrates release[1]
    He has contributed a lot in qtip-cli[2]. It would be a great help to the
    project to have him as a committer.

    Current committers please vote +1/-1 for this nomination[3]

    [1] http://stackalytics.com/?project_type=opnfv-group&metric=commits&module=qtip&release=pike
    [2] https://git.opnfv.org/qtip/log/?qt=author&q=taseer94@gmail.com
    [3] https://wiki.opnfv.org/display/DEV/Committer+Promotions

    Change-Id: I019f3f3ba6303ad952b16da3e192ebc50a9f06dc
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>