Issue #10062

[jameskleeh]

Improving the link generator to use the namespace in the request uncovered 2 additional bugs.

1. The url mappings for /$namespace/$controler... would never be found to generate correct URLS
2. The link generator was previously passing pluginName to the namespace variable when creating URLs. That prevented a bug with the plugin name getting appended as URL parameter from showing. After passing all arguments to the createRelativeURL method, URLs like ?pluginName=foo were being created. I had to add usedParams.add("plugin"); to RegexUrlMappings.java.