Update git submodules

Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Nominating Alex Yang <yangyang1@zte.com.cn> as committer for Daisy4NFV project."
  - Nominating Alex Yang <yangyang1@zte.com.cn> as committer for Daisy4NFV project.

    Alex has been contributing the majority of code to Daisy4NFV since the
    last season[1][2].

    I have had a talk with him on IRC meeting [3] and he expressed willing to
    contribute more to Daisy4NFV project and I believe he will make a great
    addition to the core review team.

    All Daisy4NFV committers, please vote +1 or +2 if you support this nomination [4].

    This PS also propose a committer removal. Jian Yang  (yangjianyjy@chinamobile.com)
    has been inactive in the project for a long time. He

    - was not present in the project meetings for more than 6 months
     (see participant lists in the minutes or IRC); AND
    - did not contribute any patch for the project for more than 6 months; AND
    - did not participate in the email discussion of the project for more than 6 month AND
    - We failed to contact him offline.

    [1] http://stackalytics.com/?project_type=opnfv-group&metric=commits&release=all&module=daisy
    [2] https://gerrit.opnfv.org/gerrit/#/q/owner:yangyang1%2540zte.com.cn+status:merged+project:daisy
    [3] http://eavesdrop.openstack.org/meetings/daisycloud/2017/daisycloud.2017-03-24-07.58.log.html
    [4] https://wiki.opnfv.org/display/DEV/Committer+Promotions

    Change-Id: Ibd416d93d01c7fe769dfc0c5809baca4cdefca46
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>