Don't require a .dbconfig file on any masters.

masters/master.client.libvpx/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is the buildmaster config file for the 'libvpx' bot. It must
 # be installed as 'master.cfg' in your buildmaster's base directory
 # (although the filename can be changed with the --basedir option to
@@ skipping 25 matching lines @@
 # 'slavePortnum' defines the TCP port to listen on. This must match the value
 # configured into the buildslaves (with their --master option)
 c['slavePortnum'] = ActiveMaster.slave_port
 
 # Disable compression for the stdio files.
 c['logCompressionLimit'] = False
 
 # Load the list of slaves.
 slaves = slaves_list.SlavesList('slaves.cfg', 'Libvpx')
 
-config.DatabaseSetup(c, require_dbconfig=ActiveMaster.is_production_host)
+config.DatabaseSetup(c)
 
 ####### CHANGESOURCES
 if ActiveMaster.is_production_host:
   libvpx_poller = GitPoller(repourl=ActiveMaster.source_url,
                             gitbin=chromium_utils.GIT_BIN,
                             branch='master',
                             workdir='gitpoller/public',
                             category='public',
                             pollinterval=5*60)
   c['change_source'] = [libvpx_poller]
@@ skipping 130 matching lines @@
 
 ####### PROJECT IDENTITY
 
 # the 'projectName' string will be used to describe the project that this
 # buildbot is working on. For example, it is used as the title of the
 # waterfall HTML page. The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 
 c['projectName'] = ActiveMaster.project_name
 c['projectURL'] = config.Master.project_url