Attribute reqPath"+#modified" put but never removed from ServletContextAdapter attributes

Problem lies on line 104 below:

https://sventon.sonatype.org/repos/spice/show/trunk/plexus-restlet-bridge/src/main/java/org/sonatype/plexus/rest/resource/RestletResource.java?revision=2692#L87

On every request handled by restlet code (so, REST API or content, both are affected), the HTTP Request's path+"#modified" as key, and new Date() as value is put into context attributes, but no cleanup happens.

This leads on long running instances, on systems being asked for lot of content to a leak.