Ensure config directory always exist, seems to be timing issue in rspec

Author: clee-r7

lib/msf/core/modules/metadata/store.rb

@@ -104,7 +104,7 @@ def configure_user_store
 
   def get_user_store
     store_dir = ::File.join(Msf::Config.config_directory, "store")
-    FileUtils.mkdir(store_dir) if !::File.exist?(store_dir)
+    FileUtils.makedirs(store_dir) if !::File.exist?(store_dir)
     return ::File.join(store_dir, UserMetaDataFile)
   end