Replace Apache Wink dependency

I tried this new plugin
https://sonatype.github.io/ossindex-maven/maven-plugin/
and found that our dependency Apache Wink depends on a Spring version with a vulnerability. We use Apache Wink to create a mock http server. Apache Wink has been retired. However we need only a single class so I'll add that one. (I also tried to find other mock http servers, one had issues, another needed a com.sun.* class, another was too complex).