Don't start MCO service on install, start on demand

The MCO service can't be configured on install, and will install be configured
by a subsequent puppet run, so this commit changes the start type of the
service to demand, and removes the start on install attribute from the service
control element for the service. These service states will also be updated by
the module.
Remove server.cfg from puppet.wxs

Because mco cannot be fully configured in the installer, this commit removed
the inifile fragments that constructed the server.cfg file. This file will be
laid down by the mcollective module, so rather than including a partially
functional config, it is better to include no config.
Use an array for FileUtils.rm_rf
Remove pe3.0.yaml until all of the targets are ready.