US3409 changes

Added index on 'login' for usage_record and usage mongoid models
Added separate usage audit log, /var/log/openshift/broker/usage.log instead of syslog.
Moved user action log from /var/log/openshift/user_action.log to /var/log/openshift/broker/user_action.log
Added Distributed lock used in oo-admin-ctl-usage script
Added Billing Service interface
Added oo-admin-ctl-usage script to list and sync usage records to billing vendor
Added oo-admin-ctl-usage to broker-util spec file
Fixed distributed lock test
Added billing service to origin-controller
Some more bug fixes