missing entry points for swift notifications

[gordon chung]

i forgot to add entry points so it's not being loaded.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/158907

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/158907
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=29b27092567a7bbc4b7c6f769ed161b1e4d6203d
Submitter: Jenkins
Branch: master

commit 29b27092567a7bbc4b7c6f769ed161b1e4d6203d
Author: gordon chung <email address hidden>
Date: Tue Feb 24 17:55:52 2015 -0500

    add missing objectstore entry points

    the ceilometermiddleware notifications are missing entry points. this
    patch adds them. it also breaks the endpoint in two: one to build
    real meters and one to build the request event meter.

    Change-Id: I75ba73c150c0d9fa282d0388fb7178e351511097
    Closes-Bug: #1425303