Delegate sign_in_after_reset_password to resource class

Allows resource class scopes to overrides the global configuration for sign in after reset password behaviour.

test/integration/recoverable_test.rb

@@ -222,6 +222,31 @@ class PasswordTest < Devise::IntegrationTest
     end
   end
 
+  test 'does not sign in user automatically after changing its password if resource_class.sign_in_after_reset_password is false' do
+    swap User, sign_in_after_reset_password: false do
+      create_user
+      request_forgot_password
+      reset_password
+
+      assert_contain 'Your password has been changed successfully'
+      assert_not_contain 'You are now signed in.'
+      assert_equal new_user_session_path, @request.path
+      assert !warden.authenticated?(:user)
+    end
+  end
+
+  test 'sign in user automatically after changing its password if resource_class.sign_in_after_reset_password is true' do
+    swap Devise, sign_in_after_reset_password: false do
+      swap User, sign_in_after_reset_password: true do
+        create_user
+        request_forgot_password
+        reset_password
+
+        assert warden.authenticated?(:user)
+      end
+    end
+  end
+
   test 'does not sign in user automatically after changing its password if it\'s locked and unlock strategy is :none or :time' do
     [:none, :time].each do |strategy|
       swap Devise, unlock_strategy: strategy do