metrics.wikimedia.org - use apache::site

use the newer apache::site method to setup
the Apache site (which redirects to the labs
version of this)

just like what we did for stats.wm.org on the same host

the remaining virtual hosts on stat1001 are:

10-limn-reportcard.conf (unpuppetized file, bug 69625)
50-datasets.conf (already symlink, but new method?)
50-stats-wikimedia-org.conf (already symlink, new method)
community-analytics.wikimedia.org (delete?)
metrics.wikimedia.org (this change should convert it to 50-metrics..)

Change-Id: Id10e7b844ac1705b223215c6b9c3ac1536f41254
Merge "metrics.wikimedia.org - use apache::site" into production