Update checkout_workflow and spec_helper to work with Selenium

spec/spec_helper.rb

@@ -98,7 +98,7 @@ RSpec.configure do |config|
   def restart_phantomjs
     Capybara.send('session_pool').values
       .select { |s| s.driver.is_a?(Capybara::Selenium::Driver) }
-      .each { |s| s.driver.restart}
+      .each { |s| s.driver.reset! }
   end
 
   config.before(:all) { restart_phantomjs }

spec/support/request/checkout_workflow.rb

@@ -4,15 +4,15 @@ module CheckoutWorkflow
   end
 
   def checkout_as_guest
-    find("button", text: "Checkout as guest").trigger "click"
+    find("button", text: "Checkout as guest").click
   end
 
   def place_order
-    find("button", text: "Place order now").trigger "click"
+    find("button", text: "Place order now").click
   end
 
   def toggle_accordion(id)
-    find("##{id} dd a").trigger "click"
+    find("##{id} dd a").click
   end
 
   def toggle_details