r9804: * doc/ref-ooddl.xml: minor changes to syntax and examples entries

r9804:         * doc/ref-ooddl.xml: minor changes to syntax and examples entries
        for uniformity.
        * doc/ref-oodml.xml: add examples for OODML.
        * sql/oodml.lisp: ensure SELECT passes on its REFRESH argument
        to FIND-ALL.
        * sql/metaclasses.lisp: update docstrings.
        * tests/test-init.lisp: change :db-constraints for emplid to
        (:not-null :unique) as a temporary test for multiple column
        constraints in DEF-VIEW-CLASS.
        * tests/test-oodml.lisp: add tests for *DB-AUTO-SYNC* and
        return type of (SETF SLOT-VALUE-USING-CLASS).