Cleanup discovery.zookeeper package

git-svn-id: https://svn.apache.org/repos/asf/cxf/dosgi/trunk@1487605 13f79535-47bb-0310-9956-ffa450edef68
More discovery.zookeeper package cleanup and little refactorings

git-svn-id: https://svn.apache.org/repos/asf/cxf/dosgi/trunk@1487608 13f79535-47bb-0310-9956-ffa450edef68