Renaming configure -> trainFor and Behavior -> Trainer

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/proxy/branches/version-2.0-work@1508994 13f79535-47bb-0310-9956-ffa450edef68
Adding StubBuilder.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/proxy/branches/version-2.0-work@1508995 13f79535-47bb-0310-9956-ffa450edef68