Change deleterator notification log-level to info

When the collectd default recipe runs, it is currently logging "Running old plugin deleterator" as an **error** during the run. As this is just a notification of state, I have changed this message to instead be **info** level to prevent any confusion. 

```
[Fri, 16 Nov 2012 10:39:39 -0500] INFO: *** Chef 10.12.0 ***
[Fri, 16 Nov 2012 10:39:40 -0500] INFO: Run List is [role[single-compute], role[collectd-client], role[cinder-volume]]
[Fri, 16 Nov 2012 10:39:40 -0500] INFO: Run List expands to [osops-utils::packages, openssh, ntp, sosreport, rsyslog::default, hardware, osops-utils::default, nova::compute, collectd-graphite::collectd-client, cinder::cinder-volume]
[Fri, 16 Nov 2012 10:39:40 -0500] INFO: Starting Chef Run for blade3.lab.ttc
[Fri, 16 Nov 2012 10:39:40 -0500] INFO: Running start handlers
[Fri, 16 Nov 2012 10:39:40 -0500] INFO: Start handlers complete.
[Fri, 16 Nov 2012 10:39:40 -0500] INFO: Loading cookbooks [apache2, apt, aws, build-essential, cinder, collectd, collectd-graphite, collectd-plugins, database, dsh, erlang, glance, graphite, hardware, keystone, monit, monitoring, mysql, nova, ntp, openssh, openssl, osops-utils, postgresql, rabbitmq, rsyslog, selinux, sosreport, sysctl, xfs, yum]
[Fri, 16 Nov 2012 10:39:41 -0500] WARN: Missing gem 'right_aws'
[Fri, 16 Nov 2012 10:39:41 -0500] ERROR: Running old plugin deleterator
[Fri, 16 Nov 2012 10:39:41 -0500] INFO: osops-utils/autoetchosts: Setting up /etc/hosts for 2 entries
...
```