Update git submodules

Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "[fuel] Improved IP handling on config template"
  - [fuel] Improved IP handling on config template

    -New IP addressing.
    Starts on lower available addresses for
    better compatibilty for small networks.
    IPs assigned secuentially and independently
    on each network.

    -Switched to advanced IP generation filters.
    Defined integers are no longer end of the IP address part
    but host order on the IP network.

    -Dynamic generation of compute nodes

    JIRA:FUEL-335

    Change-Id: Ie95b83af64cb21ba27749d5f5d1506bfbc9ddf15
    Signed-off-by: Guillermo Herrero <guillermo.herrero@enea.com>