Remove the parallel_test gem

Gemfile

@@ -148,8 +148,6 @@ group :development, :test do
   gem 'rubocop-checkstyle_formatter', require: false
   gem 'rubocop-rspec', require: false
 
-  gem 'parallel_tests', '~> 2.10'
-
   gem 'brakeman', require: false
 
   # Deploy

Gemfile.lock

@@ -406,9 +406,6 @@ GEM
     openstack (3.3.7)
       json
     orm_adapter (0.5.0)
-    parallel (1.10.0)
-    parallel_tests (2.10.0)
-      parallel
     parser (2.3.3.1)
       ast (~> 2.2)
     pg (0.19.0)
@@ -692,7 +689,6 @@ DEPENDENCIES
   newrelic_rpm
   openid_connect
   openstack
-  parallel_tests (~> 2.10)
   pg
   poltergeist
   pry-byebug

config/database.yml

@@ -13,4 +13,4 @@ test:
   adapter: sqlite3
   pool: 5
   timeout: 5000
-  database: db/test<%= ENV['TEST_ENV_NUMBER'] %>.sqlite3
+  database: db/test.sqlite3

spec/spec_helper.rb

@@ -38,7 +38,7 @@ require 'capybara/poltergeist'
 Capybara.javascript_driver = :poltergeist
 Capybara.ignore_hidden_elements = false
 Capybara.register_driver :poltergeist do |app|
-  Capybara::Poltergeist::Driver.new(app, js_errors: true, port: 44_678 + ENV['TEST_ENV_NUMBER'].to_i, phantomjs_options: ['--proxy-type=none'], timeout: 180)
+  Capybara::Poltergeist::Driver.new(app, js_errors: true, port: 44_678, phantomjs_options: ['--proxy-type=none'], timeout: 180)
 end
 
 ActiveSupport::Deprecation.silenced = true