Un-dummy apache2 service

To make a series of patches for the Apache puppetization easier to manage, in
change Ie41164db7 I made the apache2 service a dummy, so if files get deleted
inappropriately we have a chance to fix it before the service is restarted.
Now that all of the patches have been applied (and applied correctly), it's
safe to make this a real service again.

Change-Id: Ic89abbc50632e3687acd87b0df46addbd965fe96