CAY-1911 BatchQuery refactoring - make Iterable

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1577594 13f79535-47bb-0310-9956-ffa450edef68
CAY-1911 BatchQuery refactoring - make Iterable

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1577596 13f79535-47bb-0310-9956-ffa450edef68
CAY-1911 BatchQuery refactoring - make Iterable

cleanup

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1577597 13f79535-47bb-0310-9956-ffa450edef68