Fix ActionMailbox feature checks

Author: jamesdabbs

spec/rspec/rails/example/mailbox_example_group_spec.rb

@@ -15,7 +15,7 @@ def receive(*)
 
 module RSpec
   module Rails
-    describe MailboxExampleGroup, :skip => !RSpec::Rails::FeatureCheck.has_active_job? do
+    describe MailboxExampleGroup, :skip => !RSpec::Rails::FeatureCheck.has_action_mailbox? do
       it_behaves_like "an rspec-rails example group mixin", :mailbox,
                       './spec/mailboxes/', '.\\spec\\mailboxes\\'
 

spec/rspec/rails/matchers/action_mailbox_spec.rb

@@ -16,9 +16,7 @@ def self.router
 class Inbox < ApplicationMailbox; end
 class Otherbox < ApplicationMailbox; end
 
-RSpec.describe "ActionMailbox matchers", :skip => !RSpec::Rails::FeatureCheck.has_active_job? do
-  include RSpec::Rails::Matchers::ActionMailbox
-
+RSpec.describe "ActionMailbox matchers", :skip => !RSpec::Rails::FeatureCheck.has_action_mailbox? do
   describe "receive_inbound_email" do
     let(:to) { ['[email protected]'] }