Add appropriate permissions to apply to the mcollective log file

When spinning up a brand new instance of openshift all-in-one type of deployment, oo-diagnostics complains about a particular log file,  here's a snippet of the output:

```
WARN: test_broker_httpd_error_log
      broker error_log: this problem indicates mcollective client logging is failing:
        Could not start logger: Errno::EACCES Permission denied - /var/log/openshift/broker/mcollective-client.log

      Please fix this issue with the following commands:
        # chown apache:root /var/log/-mcollective-client.log
        # service openshift-broker restart
```

I've adjusted mcollective_client.pp appropriately.