Fix RailsAdmin::Config.reset didn't clear the effect of previous (included|excluded)_models

Fixes #3305

Author: mshibuya

lib/rails_admin/config.rb

@@ -292,6 +292,7 @@ def reset
         @parent_controller = '::ActionController::Base'
         @forgery_protection_settings = {with: :exception}
         RailsAdmin::Config::Actions.reset
+        RailsAdmin::AbstractModel.reset
       end
 
       # Reset a provided model's configuration.

spec/rails_admin/config_spec.rb

@@ -328,6 +328,25 @@ class RecursivelyEmbedsMany
     end
   end
 
+  describe '.reset' do
+    before do
+      RailsAdmin.config do |config|
+        config.included_models = ['Player', 'Team']
+      end
+      RailsAdmin::AbstractModel.all
+      RailsAdmin::Config.reset
+      RailsAdmin.config do |config|
+        config.excluded_models = ['Player']
+      end
+    end
+    subject { RailsAdmin::AbstractModel.all.map { |am| am.model.name } }
+
+    it 'refreshes the result of RailsAdmin::AbstractModel.all' do
+      expect(subject).not_to include 'Player'
+      expect(subject).to include 'Team'
+    end
+  end
+
   describe "field types code reloading" do
     before { Rails.application.config.cache_classes = false }
     after { Rails.application.config.cache_classes = true }

spec/spec_helper.rb

@@ -100,7 +100,6 @@ def password_digest(password)
 
     DatabaseCleaner.start
     RailsAdmin::Config.reset
-    RailsAdmin::AbstractModel.reset
   end
 
   config.after(:each) do