Don't force fixtures rebuild on each rspec run

Main purpose of fixtures for us is to speed up test runs. Rebuilding
fixtures each run makes them pointless. They will be rebuilt automatically
if some of "files_to_check" are changed, so we're protected from the case
when fixtures are outdated and don't load properly.

spec/spec_helper.rb

@@ -82,9 +82,6 @@ def client_assertion_with_nonexistent_client_id_path
                                                            "client_assertion_with_nonexistent_client_id.txt")
 end
 
-# Force fixture rebuild
-FileUtils.rm_f(Rails.root.join("tmp", "fixture_builder.yml"))
-
 # Requires supporting files with custom matchers and macros, etc,
 # in ./support/ and its subdirectories.
 fixture_builder_file = "#{File.dirname(__FILE__)}/support/fixture_builder.rb"
@@ -93,6 +90,9 @@ support_files.each {|f| require f }
 require fixture_builder_file
 
 RSpec.configure do |config|
+  config.fixture_path = Rails.root.join("spec", "fixtures")
+  config.global_fixtures = :all
+
   config.include Devise::Test::ControllerHelpers, type: :controller
   config.include Devise::Test::IntegrationHelpers, type: :request
   config.mock_with :rspec