failing SQLServer unit tests

    replacing with entities that don't use autoincrement...
    autoincrement PK is irrelevant for the test at hand

    where we can't, using Cayenne to INSERT new objects

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1566114 13f79535-47bb-0310-9956-ffa450edef68