CMIS-875: TCK versioning test improvements

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1646182 13f79535-47bb-0310-9956-ffa450edef68
minor improvements

git-svn-id: https://svn.apache.org/repos/asf/chemistry/opencmis/trunk@1646195 13f79535-47bb-0310-9956-ffa450edef68