Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Install network pkgs during OS installation

    Before network is setup, host can't access to internet.
    Install bridge-utils, ifenslave and vlan when cobbler
    managing OS installation so when network restart all pkgs
    needed is ready.

    Change-Id: Idaa880ed0abfb50f417d67fe55e964992a185c80
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>