apache_site automatically appends .conf.

[gerr1t]

From the apache_site.rb from the apache cookbook: "conf_name = "#{params[:name]}.conf"

This change is needed because it is failing to activate the munin vhost:

I, [2015-05-28T15:17:19.987614 #16970] INFO --: * execute[a2ensite munin.conf.conf] action run[2015-05-28T13:17:19+00:00] INFO: Processing execute[a2ensite munin.conf.conf] action run (munin::server_apache line 25)