Update git submodules

Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "bugfix: regex for dpi"
  - bugfix: regex for dpi

    see: https://build.opnfv.org/ci/view/qtip/job/
    qtip-os-nosdn-kvm-ha-zte-pod3-daily-danube/3/console

    Previous regex cann't match with log like:
    "nDPI throughput:       943.34 K pps / 8.86 Gb/sec".
    For pps, there are two type of unit: K and M.
    Same with bps.

    Change-Id: I247c8b6049cc8b264fe894538cd4f89ba544c0b8
    Signed-off-by: wu.zhihui <wu.zhihui1@zte.com.cn>