Fix service[apache2] CHEF-3694 duplication

This fixes an instance of [CHEF-3694 ](https://tickets.opscode.com/browse/CHEF-3694) in the apache2 cookbook.

I am not entirely sure why the `enable` action was moved to the top of the script (I couldn't find anything that requires it). If this isn't acceptable, I can always use two `service`'s with a different name.