re-add server unit tests

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522221 13f79535-47bb-0310-9956-ffa450edef68
commit frequently based on (http://t.cn/zjxJ71X), there should be more robust and user-friendly features to develop.

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522222 13f79535-47bb-0310-9956-ffa450edef68
commit frequently based on (http://t.cn/zjxJ71X), there should be more robust and user-friendly features to develop.

git-svn-id: https://svn.apache.org/repos/asf/james/hupa/trunk@1522223 13f79535-47bb-0310-9956-ffa450edef68