CAY-1913 Refactor org.apache.cayenne.access.trans into query-specific packages

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1577840 13f79535-47bb-0310-9956-ffa450edef68
CAY-1913 Refactor org.apache.cayenne.access.trans into query-specific packages

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1577841 13f79535-47bb-0310-9956-ffa450edef68