fix noc.wikimedia.org/db.php

at the beginning of 2014, db.php was renamed to db-pmtpa.php, also
creating a db-eqiad.php.

Note I don't think "getRealmSpecificFilename(...)" can
or should be used here.

Bug: T73697
Change-Id: I8a4ebfeb05340139fb56d85f3b2be8eb324ac0be