Update git submodules

Update git submodules

* Update docs/submodules/compass4nfv from branch 'stable/danube'
  - Merge "Fix memcached doesn't start issue" into stable/danube
  - Fix memcached doesn't start issue

    JIRA: -

    Sometimes memcached does not start after installation finished,
    which will cause issues like openstack dashboard open instance
    console failure.

    This patch add memcached restart notify during package installation
    and add memcached to cron service-status-check task's config file:
    /opt/service

    Change-Id: I625899348fb447875fcca7beedb619b5490ce567
    Signed-off-by: QiLiang <liangqi1@huawei.com>
    (cherry picked from commit 5dfa77861d3d5d561dfa19edcc71363a2b91e96b)