NO-JIRA: got skeleton Java system tests working from the new top-level pom.xml, and renamed some artifactIds for consistency.
Also removed redundant versions and groupIds from pom.xml files.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/branches/jni-binding@1429820 13f79535-47bb-0310-9956-ffa450edef68