CollectorService missing storage_conn

[Andrew Melton]

When the CollectorService is instantiated, no storage_conn is set up. Thus, when store_events = True is set, a no property 'stroage_conn' expcetion is thrown.

Steps to reproduce:
1) Setup a devstack with ceilometer-api and ceilometer-collector enabled
2) Set store_events = True in [collector] group in ceilometer config
3) Restart ceilometer-collector
4) Boot a new instance
5) Note exceptions thrown when the collector attempts to store the events.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/38309

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/38309
Committed: http://github.com/openstack/ceilometer/commit/d73b1c5e6b45db7db33a1dfc91fe3d6e3aaf1f12
Submitter: Jenkins
Branch: master

commit d73b1c5e6b45db7db33a1dfc91fe3d6e3aaf1f12
Author: Andrew Melton <email address hidden>
Date: Tue Jul 23 11:10:37 2013 -0400

    Sets storage_conn in CollectorService.

    Fixes bug 1204133

    Storage_conn was not being set when the CollectorService
    was instantiated, thus enabling event storage would cause
    exceptions when trying to store the event.

    Change-Id: Ie7f84e1c266239cf7052fd5aba55577a257d2b1b