fix Rakefile to work db:migrate

Rakefile

@@ -1,17 +1,16 @@
 require "bundler/gem_tasks"
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'dotenv/tasks'
+require 'fluentd_server/environment'
 
 require 'rspec/core/rake_task'
 RSpec::Core::RakeTask.new(:spec) do |t|
   t.rspec_opts = ["-c", "-f progress"] # '--format specdoc'
   t.pattern = 'spec/**/*_spec.rb'
 end
-
-lib = File.expand_path('../lib', __FILE__)
-$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require 'dotenv/tasks'
-require 'fluentd_server/config'
-
-require 'sinatra/activerecord/rake'
+task :test => :spec
+task :default => :spec
 
 task :console => :dotenv do
   require "fluentd_server"
@@ -22,5 +21,4 @@ task :console => :dotenv do
 end
 task :c => :console
 
-task :test => :spec
-task :default => :spec
+require 'sinatra/activerecord/rake'