implement engines method locally instead of adding refinement

Gemfile

@@ -21,6 +21,7 @@ group :development do
 end
 
 group :development, :test do
+  gem 'metasploit-concern', :git => "https://github.com/rapid7/metasploit-concern.git", :branch => "staging/MS-888/engines-is-deprecated"
   # automatically include factories from spec/factories
   gem 'factory_girl_rails', '~> 4.5.0'
   # Make rspec output shorter and more useful

Gemfile.lock

@@ -10,7 +10,7 @@ PATH
       jsobfu (~> 0.4.1)
       json
       metasm (~> 1.0.2)
-      metasploit-concern (= 1.0.0)
+      metasploit-concern
       metasploit-credential (= 1.0.1)
       metasploit-model (= 1.0.0)
       metasploit-payloads (= 1.1.0)

lib/msf/base/simple/framework/module_paths.rb

@@ -21,7 +21,7 @@ module Msf
             allowed_module_paths << Msf::Config.user_module_directory
           end
 
-          Rails.application.railties.engines.each do |engine|
+          ::Rails::Engine.subclasses.map(&:instance).each do |engine|
             extract_engine_module_paths(engine).each do |path|
               allowed_module_paths << path
             end

lib/msf/core/db_manager/migration.rb

@@ -10,7 +10,7 @@ module Msf::DBManager::Migration
            "the .bundle/config manually and then `bundle install`"
     end
 
-    Rails.application.railties.engines.each do |engine|
+    ::Rails::Engine.subclasses.map(&:instance).each.each do |engine|
       migrations_paths = engine.paths['db/migrate'].existent_directories
 
       migrations_paths.each do |migrations_path|

metasploit-framework.gemspec

@@ -61,7 +61,7 @@ Gem::Specification.new do |spec|
   # Metasm compiler/decompiler/assembler
   spec.add_runtime_dependency 'metasm', '~> 1.0.2'
   # Metasploit::Concern hooks
-  spec.add_runtime_dependency 'metasploit-concern', '1.0.0'
+  spec.add_runtime_dependency 'metasploit-concern'
   # Metasploit::Credential database models
   spec.add_runtime_dependency 'metasploit-credential', '1.0.1'
   # Database models shared between framework and Pro.