CAY-1900 Allow DataNode name to be used as a root of SQLTemplate.

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1568606 13f79535-47bb-0310-9956-ffa450edef68
CAY-1900 Allow DataNode name to be used as a root of SQLTemplate.

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1568607 13f79535-47bb-0310-9956-ffa450edef68