Update git submodules

Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "Adds the Free and Open-source Ghost (FOG)"
  - Adds the Free and Open-source Ghost (FOG)

    JIRA: N/A

    Adds a handler which will talk with the REST api
    running on the FOG server.
    This allows the pod_manager to ghost images onto hosts
    in order to prep them for deployment and clean them afterwards.

    Change-Id: Ic00e992874ca3371b6d6e8ac2450a1ef0c765e67
    Signed-off-by: Parker Berberian <pberberian@iol.unh.edu>