Update container sync to use internal client

[OpenStack Infra]

https://review.openstack.org/170340
commit 61a9d35fd58381b7c299f125ef01d00f9b0203fe
Author: Yuan Zhou <email address hidden>
Date: Wed Dec 24 11:52:34 2014 +0800

    Update container sync to use internal client

    This patch changes container sync to use Internal Client instead
    of Direct Client.

    In the current design, container sync uses direct_get_object to
    get the newest source object(which talks to storage node directly).
    This works fine for replication storage policies however in
    erasure coding policies, direct_get_object would only return part
    of the object(it's encoded as several pieces). Using Internal
    Client can get the original object in EC case.

    Note that for the container sync put/delete part, it's working in
    EC since it's using Simple Client.

    Signed-off-by: Yuan Zhou <email address hidden>

    DocImpact
    Change-Id: I91952bc9337f354ce6024bf8392046a1ecf6ecc9

[Lana (loquacity)]

From my reading, this doesn't have user impact. If you think I'm wrong, please reopen with more information. Thanks, Lana.