contint: Split up apache logs by vhost

We had logs in access.log and some of them in other_vhosts_access.log.
That is a bit confusing when tailing the log files.

This patch creates three new access log files with they error files
counterparts:

 doc_access.log : doc.(mediawiki|wikimedia).org
 integration_access.log : integration.(mediawiki|wikimedia).org
 qunit_access.log : for qunit.localhost (that is the QUnit tests being
                    run in a headless browser).

Still have to fix the Jenkins and Zuul proxies to log to different files
but that will be in another patch :)

Change-Id: I53c01978e509cf27b5b12d73e10088736d071757
Merge "contint: Split up apache logs by vhost" into production