Use TrimPrefix to strip listen path (#2316)
Use TrimPrefix to strip listen path (#2316)

Fixes #2313 
Same as #2211 Missed this case

`strings.Replace()` method was used to strip the `listen_path`.
So when URL rewrite plugin was used to call an endpoint that contained `listen_path` anywhere in it's path, it was getting removed.

To fix this I replaced `strings.Replace()` with `strings.TrimPrefix()`
lonelycode/tyk,lonelycode/tyk,lonelycode/tyk