Refactor coverage tools usage

rspec spec # no coverage generated
SIMPLECOV=true rspec spec # generate coverage locally into ./coverage
COVERALLS=true rspec spec # generate and send coverage data to coveralls.io
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

features/support/env.rb

-require 'simplecov' unless ENV['CI']
+if ENV['SIMPLECOV']
+  require 'simplecov'
+end
 
-if ENV['TRAVIS']
+if ENV['COVERALLS']
   require 'coveralls'
-  Coveralls.wear_merged!
+  Coveralls.wear_merged!('rails')
 end
 
 ENV['RAILS_ENV'] = 'test'
 require './config/environment'
-
 require 'rspec'
 require 'rspec/expectations'
 require 'database_cleaner'
 require 'spinach/capybara'
 require 'sidekiq/testing/inline'
 
-
 %w(select2_helper test_env repo_helpers).each do |f|
   require Rails.root.join('spec', 'support', f)
 end

spec/spec_helper.rb

-# This file is copied to spec/ when you run 'rails generate rspec:install'
-ENV["RAILS_ENV"] ||= 'test'
-require File.expand_path("../../config/environment", __FILE__)
-
-require 'simplecov' unless ENV['CI']
+if ENV['SIMPLECOV']
+  require 'simplecov'
+end
 
-if ENV['TRAVIS']
+if ENV['COVERALLS']
   require 'coveralls'
-  Coveralls.wear_merged!
+  Coveralls.wear_merged!('rails')
 end
 
+ENV["RAILS_ENV"] ||= 'test'
+require File.expand_path("../../config/environment", __FILE__)
 require 'rspec/rails'
 require 'capybara/rails'
 require 'capybara/rspec'