After a URI is normalized, you usually don't want to add more stuff to it, because often that defeats the purpose of having a URI normalized.  If you have to add additional parameters like this, you can use send_request_cgi() instead of send_request_raw, and then add the "lol" parameter in "vars_get".  Here's an example:

https://github.com/rapid7/metasploit-framework/wiki/How-to-Send-an-HTTP-Request-Using-HTTPClient