Previously, the spring-web pom still depended on the EBR-style
com.springsource artifactId for hessian.
It now depends on Maven Central-style com.caucho:hessian:3.2.1 naming.
Note that Hessian 3.2.1 acutally does not exist in Maven Central, but is
present in the SpringSource repository at http://repo.springsource.org.
In any case, the dependency is optional, so should not cause issues at
build time for applications dependent on spring-web.
Issue: SPR-9854
5e318e73f8