moving python-neutronclient Make from tools/packaging/third_party to tools/packaging/openstack/centos_64/neutronclient/icehouse
    added python-pbr dependency in neutronclient spec file for icehouse.
    neutronclient new pacakge moved to 3contrail and removed epoch.
    new package is already added in cache
    depends_packages.cfg modified with 3contrail packages.
    manifest files already modified to fetch sources in distro/openstack/ instead of third_party.
    All these changes are for centos_64/65 icehouse

Change-Id: Ib3868cf96406ecee699802b5db7df2990b09071b