failing SQLServer unit tests

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

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/branches/STABLE-3.1@1566065 13f79535-47bb-0310-9956-ffa450edef68
reducing the test set size 10x for speed

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/branches/STABLE-3.1@1566066 13f79535-47bb-0310-9956-ffa450edef68