Don't delete ssl key and cert if a user asked not to

msfdb

@@ -577,8 +577,10 @@ def delete_web_service
   stop_web_service
 
   File.delete(@ws_pid) if web_service_pid_status == WebServicePIDStatus::INACTIVE
+  if @options[:delete_existing_data]
     File.delete(@options[:ssl_key]) if File.file?(@options[:ssl_key])
     File.delete(@options[:ssl_cert]) if File.file?(@options[:ssl_cert])
+  end
 end
 
 def reinit_web_service