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>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index 424cfd1..b641a0d 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit 424cfd11e45e9728fbb1bca7c611f108da591f23
+Subproject commit b641a0d00215d564feba6e5d2828bd2d17a9206a