Update git submodules

Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Align example config files to pharos format

    After [1], get_mac_addresses_for_virtual()'s behavior was
    changed. So in order to let it to produce right mac_addresses for
    both pharos's and example's config file, the example config files'
    format should also be changed accordingly.

    [1] https://gerrit.opnfv.org/gerrit/#/c/50325/

    Change-Id: Ia1ee481057fbe87ab8410c0354c4724bcf013ac4
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>