Small bug with matrix maximum_routes error response

[FinnStutzenstein]

Here's what I did

Request more routes in the matrix service than maximum_routes, e.g. 51 points.

Here's what I got

I've got an error: Request parameters exceed the server configuration limits. Only a total of 2601 routes are allowed.

Here's what I was expecting

The error should contain the correct amount of maximum routes, not what the user has given. In my case 2500.

Here's what I think could be improved

Fix the error message here:

https://github.com/GIScience/openrouteservice/blob/d1e158a96f1f8053c16f5d60c49772d8c4ccf784/openrouteservice/src/main/java/org/heigit/ors/api/requests/matrix/MatrixRequestHandler.java#L107

[nilsnolde]

Yep, absolutely! Do I smell a PR? :innocent:

[FinnStutzenstein]

I can do this later :)