Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Support to build docker image with commit id"
  - Support to build docker image with commit id

    JIRA: DOVETAIL-447

    this support dovetail to make tag/container snapshot at some
    commit id

    this will also used for functest/yardstick if needed, since their danube.2.0/3.0
    may not satisfy dovetail requirements, while their snapshots at some commit id
    satisfy.

    Change-Id: I76cf6df586d1c9f0f563c6bfc039e3e271dc3de8
    Signed-off-by: MatthewLi <matthew.lijun@huawei.com>