stats.wm.org - revert port config via apache::conf

partial revert of I371d9bba67b2

apache::conf writes the port config into:
/etc/apache2/conf-enabled/50-stats-apache-ports.conf

as opposed to /etc/apache2/ports.conf which comes
from the distro package, but we also puppetized
because it did not contain NameVirtualHost on 443 per
default

and if that ports.conf is not deleted or comes back
when the server is reinstalled we have a conflict,
resulting in "port already in use" and Apache failing
to even start

Change-Id: Ia29bb1106c2893526dc1bd8f61328dbf16e1bbc0