Update git submodules

Update git submodules

* Update docs/submodules/bottlenecks from branch 'master'
  - bug-fix: no percentage calculated in verify ci

    JIRA: BOTTLNECK-219

    It seems that ci verify job could not get the coverage percentage
    for empty directory. This patch is to add __init__ file for the
    empty directory to avoid the empty check.
    note that offline test does not has this issue

    Change-Id: I67ce149438516429f7285e9424a57439b188c070
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>