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

masters/master.tryserver.chromium.angle/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # Copyright (c) 2015 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.
 
 # READ THIS:
 # See http://dev.chromium.org/developers/testing/chromium-build-infrastructure
 
 import os
@@ skipping 13 matching lines @@
 
 m_annotator = annotator_factory.AnnotatorFactory(ActiveMaster)
 
 # This is the dictionary that the buildmaster pays attention to. We also use
 # a shorter alias to save typing.
 c = BuildmasterConfig = {}
 
 # Disable merge requests because this is a tryserver
 c['mergeRequests'] = False
 
-config.DatabaseSetup(c, require_dbconfig=ActiveMaster.is_production_host)
+config.DatabaseSetup(c)
 
 ####### CHANGESOURCES
 
 c['change_source'] = []
 
 ####### BUILDERS
 
 c['builders'] = []
 
 # ANGLE Android bots
@@ skipping 135 matching lines @@
 c['logCompressionLimit'] = False
 
 # Adjust the buildCaches to be 3x the number of slaves per builder.
 c['autoBuildCacheRatio'] = 3
 
 ####### PROJECT IDENTITY
 
 # The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 c['projectURL'] = 'http://dev.chromium.org/developers/testing/try-server-usage'