Puppet can now find upstart scripts

Puppet looks in /etc/init.d for statsd and carbon-cache and since these two do
not exists, error is thrown. This patch creates a symlink between:
* /etc/init.d/statsd and /etc/init/statsd.conf
* /etc/init.d/carbon-cache and /etc/init/carbon-cache.conf
Merge pull request #1208 from nhenezi/puppet-upstart-fix

Puppet can now find upstart scripts