(1) add --expect-errors option;
(2) add --expect-warnings option;
(3) add ttva:expectedErrors annotation attribute;
(4) add ttva:expectedWarnings annotation attribute;
(5) add ttva:warnOn annotation attribute;
(6) add ttva:noWarnOn annotation attribute;
(7) add metadata verification framework;
(8) add all metadata (valid) test;
(9) add disallowed metadata attributes test;